Genomes and Genes
Summary: The introduction of error due to systematic differences in the characteristics between those selected and those not selected for a given study. In sampling bias, error is the result of failure to ensure that all members of the reference population have a known chance of selection in the sample.
Publications307 found, 100 shown here
- A structural approach to selection biasMiguel A Hernán
Department of Epidemiology, Harvard School of Public Health, Boston, Massachusetts 02115, USA
Epidemiology 15:615-25. 2004The term "selection bias" encompasses various biases in epidemiology. We describe examples of selection bias in case-control studies (eg, inappropriate selection of controls) and cohort studies (eg, informative censoring)...
- Assessment of publication bias, selection bias, and unavailable data in meta-analyses using individual participant data: a database surveyIkhlaaq Ahmed
MRC Midlands Hub for Trials Methodology Research, School of Health and Population Sciences, University of Birmingham, Birmingham B15 2TT, UK
BMJ 344:d7762. 2012To examine the potential for publication bias, data availability bias, and reviewer selection bias in recently published meta-analyses that use individual participant data and to investigate whether authors of such meta-analyses seemed ..
- Selection bias in gene extraction on the basis of microarray gene-expression dataChristophe Ambroise
Laboratoire Heudiasyc, Unité Mixte de Recherche Centre National de la Recherche Scientifique 6599, 60200 Compiegne, France
Proc Natl Acad Sci U S A 99:6562-6. 2002..results the test error or the leave-one-out cross-validated error is calculated without allowance for the selection bias. There is no allowance because the rule is either tested on tissue samples that were used in the first ..
- Assessing the sensitivity of meta-analysis to selection bias: a multiple imputation approachJames Carpenter
Department of Medical Statistics, London School of Hygiene and Tropical Medicine, London, UK
Biometrics 67:1066-72. 2011..We illustrate our approach using a small meta-analysis of benign prostatic hyperplasia...
- A high response is not essential to prevent selection bias: results from the Leiden 85-plus studyA Bootsma van der Wiel
Leiden 85 plus Study, Leiden University Medical Center, C2 R Gerontology and Geriatrics, Department of Internal Medicine, P O Box 9600, The Netherlands
J Clin Epidemiol 55:1119-25. 2002We tested the hypothesis that an additional effort to increase the response rate would diminish selection bias in a community-based cohort study...
- Funnel plots for detecting bias in meta-analysis: guidelines on choice of axisJ A Sterne
MRC Health Services Research Collaboration, Department of Social Medicine, University of Bristol, Canynge Hall, Whiteladies Road, BS8 2PR, Bristol, UK
J Clin Epidemiol 54:1046-55. 2001..We conclude that funnel plots of meta-analyses should generally use standard error as the measure of study size and ratio measures of treatment effect...
- Selection bias in a population survey with registry linkage: potential effect on socioeconomic gradient in cardiovascular riskElisabeth Strandhagen
School of Public Health and Community Medicine, Sahlgrenska Academy, University of Gothenburg, Gothenburg, Sweden
Eur J Epidemiol 25:163-72. 2010..The objective of this paper is to present a non-attendance analysis evaluating the possible impact of selection bias, when investigating the association between education level and cardiovascular risk factors...
- Meta-analysis and sensitivity analysis for multi-arm trials with selection biasHathaikan Chootrakool
Suan Dusit Rajabhat University, Thailand
Stat Med 30:1183-98. 2011..This method allows for different amounts of selection bias and helps to investigate how sensitive the main interest parameter is when compared with the estimates of the ..
- National HIV prevalence estimates for sub-Saharan Africa: controlling selection bias with Heckman-type selection modelsDaniel R Hogan
Harvard School of Public Health, Department of Global Health and Population, 665 Huntington Ave, Building 1, Boston, MA 02115, USA
Sex Transm Infect 88:i17-23. 2012..However, limited participation in these surveys can lead to selection bias. We control for selection bias in national HIV prevalence estimates using a novel approach, which unlike ..
- Differential loss of participants does not necessarily cause selection biasKristie N Carter
Department of Public Health, University of Otago, New Zealand
Aust N Z J Public Health 36:218-22. 2012..This is often assumed to induce selection bias. However, selection bias only occurs if the exposure-outcome association differs for participants compared to ..
- Combining directed acyclic graphs and the change-in-estimate procedure as a novel approach to adjustment-variable selection in epidemiologyDavid Evans
Inserm UMR S 707, Paris, France
BMC Med Res Methodol 12:156. 2012..This paper proposes such an approach which aims to produce well-adjusted estimates for a given research question, based on plausible DAGs consistent with the data at hand, combining prior knowledge and standard regression methods...
- Population reach and recruitment bias in a maintenance RCT in physically active older adultsBrian C Martinson
HealthPartners Research Foundation, Minneapolis, MN, USA
J Phys Act Health 7:127-35. 2010....
- LQAS: User BewareDale A Rhoda
College of Public Health, The Ohio State University, Columbus, OH, USA
Int J Epidemiol 39:60-8. 2010..In this paper, we report that there are actually two methods being called LQAS in the world today, and that one of them is badly flawed...
- Selection bias and confounding in case-crossover analyses of environmental time-series dataT F Bateson
Department of Epidemiology, Harvard School of Public Health, Boston, MA 02115, USA
Epidemiology 12:654-61. 2001..Although this approach controls for time-invariant confounders by design, it may allow for selection bias and confounding by time-varying factors...
- Written informed consent and selection bias in observational studies using medical records: systematic reviewMichelle E Kho
Department of Clinical Epidemiology and Biostatistics, McMaster University, 1280 Main Street West, Hamilton, ON, Canada L8S 4L8
BMJ 338:b866. 2009To determine whether informed consent introduces selection bias in prospective observational studies using data from medical records, and consent rates for such studies.
- Death by survey: estimating adult mortality without selection bias from sibling survival dataEmmanuela Gakidou
Institute for Quantitative Social Science, Harvard University, Cambridge, MA 02138, USA
Demography 43:569-85. 2006..By using insights from work on the statistical analysis of selection bias, survey weighting, and extrapolation problems, we propose a new and relatively simple method of recovering the ..
- Using the Internet for surveys and health researchGunther Eysenbach
J Med Internet Res 4:E13. 2002..In "open" web-based surveys, selection bias occurs due to the non-representative nature of the Internet population, and (more importantly) through self-..
- Reducing selection bias in case-control studies from rare disease registriesJ Alexander Cole
Biomedical Data Sciences and Informatics, Genzyme, a Sanofi Company, 500 Kendall Street, Cambridge, MA 02142, USA
Orphanet J Rare Dis 6:61. 2011..to prospective, randomized clinical trials, the observational design of registries is prone to introduce selection bias and negatively impact the validity of data analyses...
- Is there a selection bias in applying endovascular aneurysm repair for rupture?Richard W Lee
Division of Vascular Surgery, Department of Surgery, University of Rochester Medical Center, Rochester, NY 14642, USA
Ann Vasc Surg 22:215-20. 2008..abdominal aortic aneurysms (RAAAs) leads to reduced mortality, but concern exists that this may reflect selection bias. We reviewed our overall rupture experience early after our protocol was instituted to explore this question...
- A clinical trial alert tool to recruit large patient samples and assess selection bias in general practice researchStephanie Heinemann
Department of General Practice, University of Gottingen, Gottingen, Germany
BMC Med Res Methodol 11:16. 2011..practice face problems when recruiting patients, often resulting in low recruitment rates and an unknown selection bias, thus limiting their value for health services research...
- A method to visualize and adjust for selection bias in prevalent cohort studiesAnna Torner
Department of Epidemiology, Swedish Institute for Infectious Disease Control, Solna, Sweden
Am J Epidemiol 174:969-76. 2011b>Selection bias and confounding are concerns in cohort studies where the reason for inclusion of subjects in the cohort may be related to the outcome of interest...
- Compound treatments and transportability of causal inferenceMiguel A Hernán
Department of Epidemiology, Harvard School of Public Health, Boston, MA 02115, USA
Epidemiology 22:368-77. 2011..We discuss how such issues of "transportability" are related to the consistency condition in causal inference. With more carefully framed questions, the results of epidemiologic studies can be of greater value to decision-makers...
- Detecting referral and selection bias by the anonymous linkage of practice, hospital and clinic data using Secure and Private Record Linkage (SAPREL): case study from the evaluation of the Improved Access to Psychological Therapy (IAPT) serviceSimon de Lusignan
Department of Health Care Management and Policy, University of Surrey, Guildford, GU2 7XH, UK
BMC Med Inform Decis Mak 11:61. 2011..However, researchers do not have permission to browse and link these data without the patients' consent...
- A refined modelling approach to assess the influence of sampling on palaeobiodiversity curves: new support for declining Cretaceous dinosaur richnessGraeme T Lloyd
Department of Palaeontology, Natural History Museum, London, UK
Biol Lett 8:123-6. 2012..At present, use of this method with data that includes either Lagerstätten or 'Pull of the Recent' biases is inappropriate, although partial solutions are offered...
- The importance of covariate selection in controlling for selection bias in observational studiesPeter M Steiner
Institute for Policy Research, Northwestern University, 2040 Sheridan Road, Evanston, IL 60208, USA
Psychol Methods 15:250-67. 2010The assumption of strongly ignorable treatment assignment is required for eliminating selection bias in observational studies...
- Recruiting patients to medical research: double blind randomised trial of "opt-in" versus "opt-out" strategiesCornelia Junghans
Department of Epidemiology and Public Health, Royal Free and UCL Medical School, London WC1E 7HD
BMJ 331:940. 2005To evaluate the effect of opt-in compared with opt-out recruitment strategies on response rate and selection bias.
- The importance of estimating selection bias on prevalence estimates shortly after a disasterLinda Grievink
Centre for Environmental Health Research, National Institute for Public Health and the Environment, Bilthoven, The Netherlands
Ann Epidemiol 16:782-8. 2006..The aim was to study selective participation and its effect on prevalence estimates in a health survey of affected residents 3 weeks after a man-made disaster in The Netherlands (May 13, 2000)...
- Selection bias due to non-response in a health survey among patients with rheumatoid arthritisInes Rupp
Department of Social Medicine, Academic Medical Centre, University of Amsterdam, The Netherlands
Eur J Public Health 12:131-5. 2002..Non-response may lead to bias in health(care) outcomes...
- Selection bias and information bias in clinical researchGiovanni Tripepi
CNR IBIM, Clinical Epidemiology and Physiopathology of Renal Diseases and Hypertension of Reggio Calabria, Reggio Calabria, Italy gtripepi ibim cnr it
Nephron Clin Pract 115:c94-9. 2010..by the investigator when recruiting individuals for the study, from factors affecting the study participation (selection bias) or from systematic distortions when collecting information about exposures and outcomes (information bias)...
- Stereotactic radiosurgery eligibility and selection bias in the treatment of glioblastoma multiformeChristopher J Anker
Department of Radiation Oncology, Huntsman Cancer Hospital, University of Utah School of Medicine, 1950 Circle of Hope, Rm 1570, Salt Lake City, UT, 581 2396, USA
J Neurooncol 98:253-63. 2010..It is possible inclusion of such patients in a series of SRS for GBM could mask a benefit in remaining patients. No significant difference in OS or PFS based on SRS-eligibility status was found...
- Quantifying the impact of selection bias caused by nonparticipation in a case-control study of mobile phone useMartine Vrijheid
International Agency for Research on Cancer, Lyon, France
Ann Epidemiol 19:33-41. 2009To quantitatively assess the impact of selection bias caused by nonparticipation in a multinational case-control study of mobile phone use and brain tumor.
- A proposed method to adjust for selection bias in cohort studiesAnna Torner
Department of Epidemiology, Swedish Institute for Infectious Disease Control, Tomtebodavägen 19A, 171 82 Solna, Sweden
Am J Epidemiol 171:602-8. 2010b>Selection bias is a concern in cohort studies in which selection into the cohort is related to the studied outcome. An example is chronic infection with hepatitis C virus, where the initial infection may be asymptomatic for decades...
- Adjustment of systematic microarray data biasesMonica Benito
Department of Statistics and Econometrics, University of Carlos III, Madrid, Spain
Bioinformatics 20:105-14. 2004..These systematic effects present a substantial hurdle to the analysis of microarray data...
- Consent for use of personal information for health research: do people with potentially stigmatizing health conditions and the general public differ in their opinions?Donald J Willison
Department of Clinical Epidemiology and Biostatistics, McMaster University, Hamilton, Ontario, Canada
BMC Med Ethics 10:10. 2009..Little is known about the opinion of those who have more or less stigmatizing health conditions regarding the need for consent for use of their personal information for health research...
- Investigating socio-economic disparities in preterm birth: evidence for selective study participation and selection biasMichael S Kramer
Department of Pediatrics, McGill University Faculty of Médecine, Montreal, Quebec, Canada
Paediatr Perinat Epidemiol 23:301-9. 2009Selective study participation can theoretically lead to selection bias. We explored this issue in the context of a multicentre cohort study of socio-economic disparities in preterm birth...
- Selection bias explains apparent differential mortality between dialysis modalitiesRobert R Quinn
University of Calgary, Foothills Medical Centre, Calgary, Alberta, T2N 2T9 Canada
J Am Soc Nephrol 22:1534-42. 2011..b>Selection bias, rather than an effect of the treatment itself, likely explains the previously described change in the ..
- Detecting association in a case-control study while correcting for population stratificationD E Reich
Whitehead Institute MIT Center for Genome Research, Cambridge, Massachusetts 02142, USA
Genet Epidemiol 20:4-16. 2001..The average of association statistics across the markers directly measures stratification. By dividing the candidate association statistic by this average, a P-value can be obtained that corrects for stratification...
- Detecting selection bias in randomized clinical trialsV W Berger
Food and Drug Administration, Rockville, Maryland 20852 1448, USA
Control Clin Trials 20:319-27. 1999Lack of concealment of allocation in randomized clinical trials can invite selection bias, which is the preferential enrollment of specific patients into one treatment group over another...
- Reporting participation in epidemiologic studies: a survey of practiceLindsay M Morton
Division of Cancer Epidemiology and Genetics, National Cancer Institute, National Institutes of Health, Department of Health and Human Services, Rockville, MD, USA
Am J Epidemiol 163:197-203. 2006Self-selection bias may threaten the internal validity of epidemiologic studies. Studies with a low level of participation are particularly vulnerable to this bias, and commentators note apparent declines in participation in recent years...
- Selection bias due to differential participation in a case-control study of mobile phone use and brain tumorsAnna Lahkola
STUK Radiation and Nuclear Safety Authority, FIN 00881 Helsinki, Finland
Ann Epidemiol 15:321-5. 2005To evaluate the possible selection bias related to the differential participation of mobile phone users and non-users in a Finnish case-control study on mobile phone use and brain tumors.
- Selection bias introduced by neuropsychological assessmentsRobert Olson
BC Cancer Agency, Vancouver Cancer Centre, Vancouver
Can J Neurol Sci 37:264-8. 2010..The introduction of the NPA decreased accrual and retention rates. We were therefore concerned regarding potential selection bias.
- Comparison of STD prevalences in the Mwanza, Rakai, and Masaka trial populations: the role of selection bias and diagnostic errorsK K Orroth
London School of Hygiene and Tropical Medicine, London, UK
Sex Transm Infect 79:98-105. 2003To assess bias in estimates of STD prevalence in population based surveys resulting from diagnostic error and selection bias. To evaluate the effects of such biases on STD prevalence estimates from three community randomised trials of STD ..
- Adjusting for observable selection bias in block randomized trialsAnastasia Ivanova
Department of Biostatistics, The University of North Carolina at Chapel Hill, NC 27599, USA
Stat Med 24:1537-46. 2005In this paper, we propose a model-based approach to detect and adjust for observable selection bias in a randomized clinical trial with two treatments and binary outcomes...
- Selection bias during recruitment of elderly subjects from the general population for psychiatric interviewsR Heun
Department of Psychiatry, University of Mainz, Germany
Eur Arch Psychiatry Clin Neurosci 247:87-92. 1997The aim of the present study was to determine and assess a possible selection bias in an epidemiologic investigation in the elderly...
- Selection bias and patterns of confounding in cohort studies: the case of the NINFEA web-based birth cohortCostanza Pizzi
Cancer Epidemiology Unit, CeRMS and CPO Piemonte, University of Turin, Via Santena 7, Turin 10126, Italy
J Epidemiol Community Health 66:976-81. 2012..Several studies have examined the effects of sample selection on the exposure-outcome association estimates in cohort studies, but the reasons why this selection may induce bias have not been fully explored...
- A review of the healthy worker effect in occupational epidemiologyC Y Li
Department of Public Health, College of Medicine, Fu Jen Catholic University, Hsinchuang, Taipei Hsien, Taiwan, ROC
Occup Med (Lond) 49:225-9. 1999..Although the HWE is frequently addressed in the context of selection bias, our review suggests that the selection of occupational cohorts with advantageous health status would ..
- Checklist for the qualitative evaluation of clinical studies with particular focus on external validity and model validityGudrun Bornhöft
Witten Herdecke University, Gerhard Kienle Weg 4, Herdecke, Germany
BMC Med Res Methodol 6:56. 2006..Although tools for its evaluation have been established, there is a lack of awareness of their significance and application. In this article, a comprehensive checklist is presented addressing these relevant criteria...
- How to assess the external validity of therapeutic trials: a conceptual approachO M Dekkers
Department of Clinical Epidemiology, Leiden University Medical Center, Leiden, The Netherlands
Int J Epidemiol 39:89-94. 2010..External validity of study results is an important issue from a clinical point of view. From a methodological point of view, however, the concept of external validity is more complex than it seems to be at first glance...
- Selection bias influences reported contralateral breast cancer incidence and survival in high risk non-BRCA1/2 patientsMadeleine M A Tilanus-Linthorst
Department of Surgical Oncology, Erasmus University Medical Centre, Rotterdam, The Netherlands
Breast Cancer Res Treat 95:117-23. 2006..A higher incidence of contralateral breast cancer (CBC) has been reported in familial BC. Ascertainment bias may influence both the reported familial CBC and survival...
- Treatment of patent ductus arteriosus and neonatal mortality/morbidities: adjustment for treatment selection biasLucia Mirea
Maternal Infant Care MiCare Research Centre, Mount Sinai Hospital, Toronto, Ontario, Canada
J Pediatr 161:689-94.e1. 2012To examine the association between treatment for patent ductus arteriosus (PDA) and neonatal outcomes in preterm infants, after adjustment for treatment selection bias.
- Less healthy, but more active: opposing selection biases when recruiting older people to a physical activity study through primary careTess J Harris
Division of Community Health Sciences, St George s, University of London, Cranmer Terrace, Tooting, London, SW17 ORE, UK
BMC Public Health 8:182. 2008..Physical activity studies in older people experience poor recruitment. We wished to assess the influence of activity levels and health status on recruitment to a physical activity study in older people...
- Analysis of observational studies in the presence of treatment selection bias: effects of invasive cardiac management on AMI survival using propensity score and instrumental variable methodsTherese A Stukel
Institute for Clinical Evaluative Sciences, Toronto, Ontario, Canada
JAMA 297:278-85. 2007..Comparisons of outcomes between patients treated and untreated in observational studies may be biased due to differences in patient prognosis between groups, often because of unobserved treatment selection biases...
- Limitation of inverse probability-of-censoring weights in estimating survival in the presence of strong selection biasChanelle J Howe
Department of Epidemiology, Gillings School of Global Public Health, University of North Carolina, Chapel Hill, 27599 7435, USA
Am J Epidemiol 173:569-77. 2011In time-to-event analyses, artificial censoring with correction for induced selection bias using inverse probability-of-censoring weights can be used to 1) examine the natural history of a disease after effective interventions are widely ..
- [Analysis of selection bias in the pilot study of a longitudinal study on aging in Spain]Angel Rodriguez Laso
Fundación INGEMA Instituto Gerontológico MATIA, San Sebastián Donosti Madrid, Espana
Gac Sanit 27:425-32. 2013To demonstrate that selection of a probabilistic sample at a national level for a study of aging in Spain is subject to selection bias. To quantify the losses produced after each phase of the administration of a questionnaire.
- Berkson's bias, selection bias, and missing dataDaniel Westreich
Department of Obstetrics and Gynecology and Duke Global Health Institute, Duke University, Durham, NC 27710, USA
Epidemiology 23:159-64. 2012..bias is widely recognized in the epidemiologic literature, it remains underappreciated as a model of both selection bias and bias due to missing data...
- The effect of seeking consent on the representativeness of patient cohorts: iron-deficiency anaemia and colorectal cancerS Damery
Primary Care Clinical Sciences, School of Health and Population Sciences, University of Birmingham, Edgbaston, West Midlands B15 2TT, UK
Colorectal Dis 13:e366-73. 2011The study aimed to establish the level of selection bias that may occur should individual patient consent be sought, by comparing characteristics of consenters and nonconsenters to a request for access to medical records within a cohort ..
- Systematic selection bias: a cause of dramatic errors in the inference of treatment effectivenessAerlyn G Dawn
J Dermatolog Treat 19:68-71. 2008..The accuracy of our inferences depends on the representativeness of those observations. Selection bias limits the accuracy of our inferences...
- Accepting critically ill transfer patients: adverse effect on a referral center's outcome and benchmark measuresAndrew L Rosenberg
University of Michigan and the Department of Veterans Affairs Health Services Research and Development Service, Veterans Affairs Ann Arbor Healthcare System, Ann Arbor, Michigan 48109 0048, USA
Ann Intern Med 138:882-90. 2003..With the most sophisticated and validated set of case-mix measures available for patients, the intensive care unit is an ideal setting in which to study the effect of a patient's being transferred from another hospital...
- Information extraction from full text scientific articles: where are the keywords?Parantu K Shah
Biocomputing, European Molecular Biology Laboratory, Heidelberg, Germany
BMC Bioinformatics 4:20. 2003..Several questions arise as to whether the effort of scanning full text articles is worthy, or whether the information that can be extracted from the different sections of an article can be relevant...
- Selection bias in a study of implantable defibrillator patients: the role of Type D personalityKrista C van den Broek
CoRPS Center of Research on Psychology in Somatic diseases, Department of Medical Psychology, Tilburg University, Tilburg, The Netherlands
Int J Behav Med 18:65-70. 2011b>Selection bias constitutes a major issue in research using volunteers as study participants.
- Selection bias in case-control studies on household exposure to pesticides and childhood acute leukemiaJérémie Rudant
Department of Epidemiology, Biostatistics and Occupational Health, Faculty of Medicine, McGill University, Montreal, Quebec, Canada
J Expo Sci Environ Epidemiol 20:299-309. 2010The goal of this study was to investigate the potential for selection bias in published case-control studies on household exposure to pesticides and childhood acute leukemia; most studies have reported positive findings...
- Addressing selection bias in dental health services researchJ Y Lee
Department of Pediatric Dentistry, School of Dentistry, University of North Carolina, Chapel Hill, NC 27599 7450, USA
J Dent Res 84:942-6. 2005..The purpose of this study was to demonstrate the use of this technique to control for selection bias in examining the effects of the The Supplemental Program for Women, Infants, and Children's (WIC) on dental ..
- Selection bias in semen studies due to self-selection of volunteersA Muller
INSERM National Institute For Health and Medical Research U569 IFR69, 94276 Le Kremlin Bicetre Cedex, France
Hum Reprod 19:2838-44. 2004Reports of a secular decrease in semen quality remain controversial, particularly due to the possibility of selection bias. We aimed to describe the potential bias due to self-selection of volunteers in semen studies involving fecund men.
- Reducing selection bias in a cluster randomized trial in West African villagesSally M Kerry
Department of Community Health Sciences, St George s Hospital Medical School, London, UK
Clin Trials 2:125-9. 2005b>Selection bias in cluster randomized trials may threaten the validity of the results. This bias may occur either at the level of the cluster or of the individual...
- Selection bias resulting from the requirement for prior consent in observational research: a community cohort of people with ischaemic heart diseaseBrian Buckley
Department of General Practice, National University of Ireland, Galway, Ireland
Heart 93:1116-20. 2007..To evaluate differences between adults who consent to participate in observational research and those who do not...
- Selection bias, confounding, or information bias?Zubair Kabir
Hypertension 50:e9; author reply e10. 2007
- Assessment of self-selection bias in a pediatric unilateral hearing loss studyJudith E C Lieu
Department of Otolaryngology Head and Neck Surgery, Washington University, St Louis, MO 63110, USA
Otolaryngol Head Neck Surg 142:427-33. 2010To examine the differences between participants and nonparticipants in a study of children with unilateral hearing loss that might contribute to selection bias.
- Investigating the impact of selection bias in dose-response analyses of preventive interventionsHerle M McGowan
NCSU Department of Statistics, North Carolina State University, 2311 Stinson Drive, Raleigh, NC 27695 8203, USA
Prev Sci 11:239-51. 2010This paper focuses on the impact of selection bias in the context of extended, community-based prevention trials that attempt to "unpack" intervention effects and analyze mechanisms of change...
- Perneger et al. excluded patients "too sick to complete a questionnaire" from a mail surveyKazim Sheikh
Med Care 43:945; author reply 945-6. 2005
- Treatment of chronic hepatitis C genotype 1 patients at an academic center in Europe involved in prospective, controlled trials: is there a selection bias?Sandra Beinhardt
Internal Medicine III, Department of Gastroenterology and Hepatology, Medical University of Vienna, Vienna, Austria
Hepatology 55:30-8. 2012..If analyzed according to the IL28B polymorphism, TPP SVR rates did not reach statistically significant differences among study and SOC patients...
- Evidence of selection bias in preterm survival studies: a systematic reviewD J Evans
Centre for Reproduction, Growth and Development, University of Leeds, D Floor Clarendon Wing, The General Infirmary at Leeds, Leeds LS2 9NS, UK
Arch Dis Child Fetal Neonatal Ed 84:F79-84. 2001To determine by how much selection bias in preterm infant cohort studies results in an overestimate of survival.
- Survival of participating and nonparticipating limb amputees in prospective study: consequences for researchJoline C Bosmans
Department of Rehabilitation Medicine CB 40, University Medical Center Groningen, University of Groningen, Groningen, The Netherlands
J Rehabil Res Dev 47:457-64. 2010..Our study sample was biased by selection and death. Participants were generally healthier than nonparticipants...
- Potential selection bias in a community-based study of PSA levels in African-American menS G Heeringa
Institute for Social Research, University of Michigan, P O Box 1248, Ann Arbor, MI 48106 1248, USA
J Clin Epidemiol 54:142-8. 2001....
- Predictors of participation and attrition in a health promotion study involving psychiatric outpatientsPeter A Vanable
Center for Health and Behavior and Department of Psychology, Syracuse University, New York 13244 2340, USA
J Consult Clin Psychol 70:362-8. 2002..These findings suggest that patients who could most benefit from risk reduction interventions are more likely to participate...
- Respondents in an epidemiologic survey had fewer psychotropic prescriptions than nonrespondents: an insight into health-related selection bias using routine health insurance dataMarie Noël Vercambre
MGEN Foundation for Public Health, Paris, France
J Clin Epidemiol 65:1181-9. 2012..Using register-based insurance data, we aimed to evaluate health-related differences between respondents and nonrespondents in a mailed epidemiologic survey, with a particular focus on mental health...
- The impact of selection bias on test decisions in randomized clinical trialsLieven Nils Kennes
RWTH Aachen University, Department of Medical Statistics, Pauwelsstrasse 30, Aachen 52074, Germany
Stat Med 30:2573-81. 2011b>Selection bias affects the evaluation of clinical trials, for example, by elevating type I error rate. We investigated the effect of selection bias on type I error rate considering permuted block randomization...
- Analysis of the impact of early surgery on in-hospital mortality of native valve endocarditis: use of propensity score and instrumental variable methods to adjust for treatment-selection biasTahaniyat Lalani
Naval Medical Center Portsmouth, Bldg 3, 1st Floor, 620 John Paul Jones Cir, Portsmouth, VA 23708, USA
Circulation 121:1005-13. 2010..This study sought to evaluate valve surgery compared with medical therapy for NVE and to identify characteristics of patients who are most likely to benefit from early surgery...
- Who are the people reluctant to participate in research? Personality correlates of four different types of nonresponse as inferred from self- and observer ratingsBernd Marcus
Psychologisches Institut, Chemnitz University of Technology, Germany
J Pers 73:959-84. 2005..We found only weak evidence of personality correlates of careless and selective item nonresponse. Findings show that nonresponse biases may have significant implications for representativeness in surveys and personality test norms...
- Evaluation of selection bias in an incident-based dementia autopsy case seriesDebby Tsuang
Department of Psychiatry and Behavioral Sciences, University of Washington, Seattle, Washington, USA
Alzheimer Dis Assoc Disord 19:67-73. 2005..autopsy-based estimates of the relative frequency of np diagnoses before and after adjusting for potential selection bias. Clinically demented subjects who were autopsied (n = 206), had died but were not autopsied (n = 271), were ..
- Selection bias in enrollment to a programme aimed at the secondary prevention of ischaemic heart disease in general practice: a cohort studyB Buckley
Department of General Practice, National University of Ireland, Galway, Ireland
Int J Clin Pract 61:1767-72. 2007..To evaluate differences between adults who participated in a secondary prevention of ischaemic heart disease (IHD) programme and those who did not...
- Capacity, consent, and selection bias in a study of deliriumD Adamis
Academic Unit, Ladywell House, 330 Lewisham High Street, London SE13 6JZ, UK
J Med Ethics 31:137-43. 2005..To investigate whether different methods of obtaining informed consent affected recruitment to a study of delirium in older, medically ill hospital inpatients...
- Diverging associations of an intended early invasive strategy compared with actual revascularization, and outcome in patients with non-ST-segment elevation acute coronary syndrome: the problem of treatment selection biasAlexander Hirsch
Department of Cardiology, B2 137, Academic Medical Center, Meibergdreef 9, PO Box 22660, 1100 DD Amsterdam, The Netherlands
Eur Heart J 30:645-54. 2009..We investigated the association between actual in-hospital revascularization and long-term outcome in patients with nSTE-ACS included in the ICTUS trial...
- Fathers' participation in family research: is there a self-selection bias?C L Costigan
Department of Psychology, P O Box 3050, STN CSC, University of Victoria, Victoria, British Columbia V8W 3P5, Canada
J Fam Psychol 15:706-20. 2001..Implications for the generalizability of findings and the recruitment of fathers are discussed...
- Low all-cause mortality in the volunteer-based Rotterdam section of the European randomised study of screening for prostate cancer: self-selection bias?S J Otto
Department of Public Health, Erasmus MC, University Medical Centre Rotterdam, PO Box 1738, 3000 DR Rotterdam, The Netherlands
J Med Screen 11:89-92. 2004The likelihood of self-selection bias in a cohort of men that entered the volunteer-based randomised prostate cancer screening trial was assessed...
- Analytic approaches to observational studies with treatment selection biasIlya Novikov
JAMA 297:2077; auhor reply 2078. 2007
- A flexible genome-wide bootstrap method that accounts for ranking and threshold-selection bias in GWAS interpretation and replication study designLaura L Faye
Dalla Lana School of Public Health, University of Toronto, ON, Canada
Stat Med 30:1898-912. 2011The phenomenon known as the winner's curse is a form of selection bias that affects estimates of genetic association...
- Resampling methods to reduce the selection bias in genetic effect estimation in genome-wide scansLong Yang Wu
Samuel Lunenfeld Research Institute, Mount Sinai Hospital, 600 University Avenue, Toronto, Ontario, Canada
BMC Genet 6:S24. 2005..bootstrap-based resampling estimators (a shrinkage, an out-of-sample, and a weighted estimator) to reduce the selection bias for genetic effect estimation in genome-wide linkage scans...
- A health facility based case-control study of effectiveness of insecticide treated nets: potential for selection bias due to pre-treatment with chloroquineJayne Webster
London School of Hygiene and Tropical Medicine, UK
Trop Med Int Health 8:196-201. 2003..07, 95% CI 0.70-1.64); therefore the misclassification of cases as controls did not introduce any selection bias. Amongst rural clinic attenders, bed net users were less likely to pre-treat with chloroquine than users (OR 0...
- Survivor treatment selection bias and outcomes research: a case study of surgery in infective endocarditisRaymond W Sy
Department of Cardiology, Concord Repatriation General Hospital, and the Departments of Cardiology and Cardiothoracic Surgery, Royal Prince Alfred Hospital, Sydney South Western Area Health Service, University of Sydney, Sydney, Australia
Circ Cardiovasc Qual Outcomes 2:469-74. 2009..However, these studies did not account for survivor treatment selection bias, which is an underrecognized source of error in observational studies...
- Selection bias in meta-analyses of gene-disease associationsJin Ling Tang
Chinese Cochrane Centre, Hong Kong Branch, Faculty of Medicine, The Chinese University of Hong Kong, Shatin, New Territories, The People s Republic of China
PLoS Med 2:e409. 2005
- Correcting HIV prevalence estimates for survey nonparticipation using Heckman-type selection modelsTill Barnighausen
Department of Global Health and Population, Harvard School of Public Health, Boston, MA, USA
Epidemiology 22:27-35. 2011HIV prevalence estimates from population-based surveys are vulnerable to selection bias if HIV status is missing for a proportion of the eligible population...
- Studywise minimization: a treatment allocation method that improves balance among treatment groups and makes allocation unpredictableMarieke Perry
Department of Geriatric Medicine, Radboud University Nijmegen Medical Centre, PO Box 9101, 6500 HB Nijmegen, The Netherlands
J Clin Epidemiol 63:1118-22. 2010..Minimization methods can improve balance but increase the possibility of selection bias. We described and evaluated the performance of a new method of treatment allocation, called studywise ..
- Impracticability of informed consent in the Registry of the Canadian Stroke NetworkJack V Tu
Institute for Clinical Evaluative Sciences, Toronto, ON, Canada
N Engl J Med 350:1414-21. 2004..However, the effect of such a requirement on the use of clinical registries and the extent to which registry data can be generalized remain uncertain...
- The performance of different propensity-score methods for estimating relative risksPeter C Austin
Institute for Clinical Evaluative Sciences, G1 06, 2075 Bayview Avenue, Toronto, Ontario M4N 3M5, Canada
J Clin Epidemiol 61:537-45. 2008..Conditioning on the propensity-score results in unbiased estimation of the expected difference in observed responses to two treatments. The performance of propensity-score methods for estimating relative risks has not been studied...
- Using propensity scores to adjust for selection bias when assessing the effectiveness of Alcoholics Anonymous in observational studiesYu Ye
Alcohol Research Group, Public Health Institute, 6475Christie Avenue, Suite 400, Emeryville, CA 94608, USA
Drug Alcohol Depend 104:56-64. 2009..Pending future randomized trials, this paper uses propensity score (PS) method to address the selection bias that potentially confounds the effect of AA in observational studies.
- Cardiac rehabilitation participation patterns in a large, tertiary care center: evidence for selection biasG G Blackburn
Department of Cardiology, Cleveland Clinic Foundation, Ohio, USA
J Cardiopulm Rehabil 20:189-95. 2000..The role of risk factor profiles in the referral of patients to cardiac rehabilitation programs has not been evaluated...
- Birth order and sibship size: evaluation of the role of selection bias in a case-control study of non-Hodgkin's lymphomaF K Mensah
Epidemiology and Genetics Unit, Department of Health Sciences, University of York, York, United Kingdom
Am J Epidemiol 166:717-23. 2007..The potential role of selection bias in explaining such heterogeneity is considered within this study...
- Case ascertainment in stroke studies: the risk of selection biasP Appelros
Department of Neurology and Geriatrics, Orebro University Hospital, Sweden
Acta Neurol Scand 107:145-9. 2003..was to compare the completeness of case ascertainment in two stroke registers, one local population-based, the other a national quality register (Riks-Stroke), and to examine if patient characteristics could be affected by selection bias.
- Consent bias in research: how to avoid itCornelia Junghans
Heart 93:1024-5. 2007
- Regarding adjuvant radiation therapy in merkel cell carcinoma: selection bias and its affect on overall survivalDouglas M Housman
J Clin Oncol 25:4503-4; author reply 4504-5. 2007
- Using directed acyclic graphs to guide analyses of neighbourhood health effects: an introductionN L Fleischer
Center for Social Epidemiology and Population Health, 3rd Floor SPH Tower, 109 Observatory St, Ann Arbor, MI 48109 2029, USA
J Epidemiol Community Health 62:842-6. 2008..The use of DAGs can be particularly informative in the study of the causal effects of social factors on health...
- Optimized Growth Media to Detect Intracellular Bacteria Implicated in Chronic DisPATRICIA MASCARELLI; Fiscal Year: 2011..abstract_text> ..
- Optimizing Chronic Disease Prevention and Management in Advanced DementiaJennifer Tjia; Fiscal Year: 2010..Analyses will adapt techniques to address selection bias in observational studies (propensity scores, comparator group restriction, and self-controlled case-series), ..
- Hypoplastic Left Heart Syndrome: Expression of RHD in the Fetus?Pirooz Eghtesady; Fiscal Year: 2013..Tremendous resources are devoted to its medical management. Therefore, understanding why HLHS happens, the goal of the proposed research would have great significance and relevance to public health. ..
- An internet based prospective study of time to pregnancyElizabeth E Hatch; Fiscal Year: 2013..Most previous studies of delayed TTP have used retrospective designs, which may be particularly subject to selection bias. This prospective cohort study in Denmark will expand a highly successful R21-funded pilot study, using the ..
- OPTICAL BIOPSY USING OPTICAL COHERENCE TOMOGRAPHYJames G Fujimoto; Fiscal Year: 2012..If successful, the proposed research will develop and demonstrate new imaging technology which will augment gastrointestinal endoscopy and open the door for improved detection of a wide range of neoplasias. ..
- Comparative Effectiveness of Advanced Diagnostic Imaging for Hepatic FibrosisJayant A Talwalkar; Fiscal Year: 2010..The proposed research has relevance to public health, because the fundamental mechanisms being investigated appear common for maintaining health and creating disease in human beings. ..
- OEF/OIF Veterans with PTSD in Mental Health Residential Treatment ProgramsEric Slade; Fiscal Year: 2013..To further minimize selection bias due to unmeasured confounders, instrumental variables estimation is used to estimate impacts of admission to ..
- Perioperative Use and Outcomes of Noninvasive Ventilation in Sleep ApneaPeter K Lindenauer; Fiscal Year: 2013..To limit the threat of selection bias we will employ a powerful set of analytical methods including hierarchical logistic regression, high-..
- MR Spectroscopy to Evaluate Liver Repopulation by Transplanted HepatocytesChandan Guha; Fiscal Year: 2009..In this proposal we propose to develop a non -invasive MR Spectroscopic Imaging (MRSI) for the detection of transplanted hepatocytes expressing brain isozyme of cratine kinase (CK-B) as a transgene reporter. ..
- The Impact of Microfinance on Health: Experimental Evidence from IndiaRohini Pande; Fiscal Year: 2013..Randomization in MFI assignment eliminates selection bias among which villages have access to microfinance...
- Cardiovascular Safety of Combination Therapies for Type 2 Diabetes MellitusJames S Floyd; Fiscal Year: 2013..Causal inference methods will be used to address time-varying selection bias that can occur in the cohort study...
- Collider Bias and the Risk Factor Paradoxes in Rheumatic Disease ResearchUYEN SA DUC TRAN NGUYEN; Fiscal Year: 2013..for these unexpected results may exist, an enticing alternative methodological explanation is a type of selection bias called collider-stratification bias (hereaftr referred to as collider bias), which occurs when one evaluates ..
- Risk of death among veterans with depressionKara Zivin; Fiscal Year: 2013....
- Bias in Retransplantation Survival Models: Selection Criteria and Hepatitis CScott W Biggins; Fiscal Year: 2011..dysfunction to identify factors that predict listing for retransplantation (Aim 1), evaluate the impact of the selection bias in current outcome models predicting post-retransplantation survival (Aim 2), develop new outcome models ..
- Prenatal Factors and Risk of Schizophrenia in a Finnish National Birth CohortALAN STEWART BROWN; Fiscal Year: 2012..virtually complete coverage of all births and hospitalizations for schizophrenia in Finland, which minimizes selection bias;and 4) homogeneity of the population, which minimizes confounding due to population stratification...
- Neighborhood Characteristics and Body Mass Index: Selection or Causation?Ken Smith; Fiscal Year: 2009..When neighborhood selection bias exists, estimates of the association between neighborhoods and BMI that do not account for its effects will ..
- Are Cardioprotective Medications Effective in ESRD?Theresa I Shireman; Fiscal Year: 2011..advanced statistical techniques, propensity scores and instrumental variables, to minimize the influence of selection bias on our results...
- The Ischemia Trial - CCCJudith S Hochman; Fiscal Year: 2013..because prior clinical trials in SIHD have enrolled patients after cath, at which point there is substantial selection bias for enrollment based on coronary anatomy...
- The Impact of Coordinating Medicare and Medicaid benefits for the dually-eligibleHye Young Jung; Fiscal Year: 2011..with a relatively long period of program observation (2001-2008) and rigorous econometric tools that mitigate selection bias. As an identification strategy, multiple econometric methods, including difference-in-difference-in-..
- Optimization of Efficacy and Safety Pharamacology of Fibrosis Imaging Agent CM-65ANDREW FRANCIS KOLODZIEJ; Fiscal Year: 2013..The ability of this development candidate to noninvasively stage fibrosis by MRI will be fully evaluated in two orthogonal animal models of disease. ..
- Early Detection and Quantification of OAKaren A Hasty; Fiscal Year: 2013....
- Investigation of Indoor Solid Fuel and Kerosene Use as Tuberculosis Risk FactorsKirk R Smith; Fiscal Year: 2013..However, there is the possibility that selection bias was responsible for our results...
- The ISCHEMIA Trial - IICCLeslee J Shaw; Fiscal Year: 2012..because prior clinical trials in SIHD have enrolled patients after cath, at which point there is substantial selection bias for enrollment based on coronary anatomy...
- Impacts of Cost Sharing and Echocardiography on Outpatient Care of Heart FailureJEROME JEFFREY FEDERSPIEL; Fiscal Year: 2013..variable approach called local instrumental variables analysis will allow for the correction of unobserved selection bias even in the setting of a heterogeneous treatment effect, a known limitation of conventional instrumental ..
- Statistical Methods to Correct for Proxy Bias in Studies of Older AdultsMICHELLE DENISE SHARDELL; Fiscal Year: 2013..Regarding the latter goal, a significant problem in epidemiologic studies of hip fracture patients is selection bias due to the large amount of data missing from the most frail and cognitively impaired patients, which may lead ..
- Cardiovascular Risks of Prescription Amphetamine Use in a National Veterans StudyARTHUR WESTOVER; Fiscal Year: 2013..It incorporates advances for: 1) adjusting for selection bias, 2) minimizing model misspecification, 3) accounting for missing data in the presence of model ..
- Effectiveness of Feeding Tubes Among Person with Advanced Cognitive ImpairmentJoan M Teno; Fiscal Year: 2010..These studies rely on observational data, yet none have attempted to control for selection bias, a potential problem in any non- randomized controlled trial...
- The ISCHEMIA Trial - EQOLDaniel B Mark; Fiscal Year: 2013..because prior clinical trials in SIHD have enrolled patients after cath, at which point there is substantial selection bias for enrollment based on anatomy...
- Objective and Perceived Neighborhood Characteristics and Cognitive DeclineRegina A Shih; Fiscal Year: 2013..effects based on sociodemographic and genetic characteristics, and test the sensitivity of our findings to selection bias Methods...
- Outcomes of Prostate Cancer Androgen Deprivation TherapyArnold L Potosky; Fiscal Year: 2012..and clinical predictors, and will use state-of-the-art effectiveness analysis techniques to correct for selection bias. The retrospective observational study will be conducted using a large, diverse population of over 45,000 men ..
- Single-Sex High Schools and STEM Careers: Males, Females and Low-SES StudentsHyunjoon Park; Fiscal Year: 2011....
- Cost-Effectiveness of Hormonal Therapy for Clinically Localized Prostate CancerSTEPHEN K contact VAN DEN EEDEN; Fiscal Year: 2010..and sociodemographic factors, and use state-of-the-art comparative effectiveness techniques to address selection bias. The retrospective observational study will be conducted using a large, diverse population of nearly 10,000 ..
- Compensating for Uncertainty Biases in Health Risk JudgmentsSCOTT D FERSON; Fiscal Year: 2010....
- High Deductible Insurance: Impact on Breast Cancer Care and OutcomesJames F Wharam; Fiscal Year: 2013..We will use employer- and member-level propensity score matching to minimize selection bias. The study will employ strong quasi- experimental designs including interrupted time-series with comparison ..
- Evaluating Community Viral Load and other Metrics for HIV Treatment as PreventionKIMBERLY POWERS; Fiscal Year: 2013..and we will compare this association across scenarios characterized by varying degrees of confounding and selection bias. This modeling approach will allow the systematic examination of a range of plausible scenarios, as well as ..
- Does smoking cessation cause anhedonia? A test of pre-clinical findingsJohn R Hughes; Fiscal Year: 2012..To insure an adequate number of continuously abstinent smokers and to decrease selection bias, they will use monetary contingencies to encourage abstinence...
- Palliative Care for Hospitalized Cancer PatientsDiane E Meier; Fiscal Year: 2010..to detect clinically meaningful differences using a novel application of the propensity score method to reduce selection bias. Reproducible structures and processes for the PCCTs will allow successful components of the program to be ..
- Quantitative MRSI to predict early response to SAHA therapy in new GBM managementHui Kuo Shu; Fiscal Year: 2013..Importantly, in addition to monitoring tumor response to SAHA therapy, our MRSI-based tool will allow assessment of the biochemical content of normal brain, and may thus indirectly monitor the subject's quality-of-life. ..
- Randomized observation study of biologic therapy for rheumatoid arthritisLARRY W contact MORELAND; Fiscal Year: 2010..empiric and non-random selection of therapies for patients in the real world is complicated by confounding or selection bias that significantly impact the outcome of any CCE analysis including differences between groups in disease ..
- Core_RT-PCR based Case-Control: Apt Measure of Influenza Vaccine EffectivenessManjusha Gaglani; Fiscal Year: 2013..eligible to participate in this CDC VE-LCI study, using a rolling 4 hour block recruitment strategy minimizing selection bias. Using RT-PCR confirmed case-control design, we will measure VE-LCI in all persons ages 6 months or older...
- Comorbid Patterns with Alcohol Use DisordersRosa M Crum; Fiscal Year: 2012..The proposed analyses should fill in many gaps in our understanding of these co-occurring conditions. ..
- Medical Care Burden of Cancer: System and Data IssuesMARK CHRISTOPHER HORNBROOK; Fiscal Year: 2010..Aim 3 - Selection Bias: Estimate the incremental medical care costs of all cancers, as well as selected cancers, for SEER-Medicare ..
- Genesis and Progression of Cerebral Cavernous MalformationsDouglas A Marchuk; Fiscal Year: 2012..and proliferative activity at earliest stages of lesion development in humans is hindered by a strong selection bias in tissue availability...
- Period3 modulation of mesenchymal stem cell fateKatherine C Krueger; Fiscal Year: 2013..Such a fate selection bias or deficit in adipose mass or function might manifest as alterations to total body composition, glucose ..
- SiRNAs in the Treatment of Alcoholic Liver DiseaseBiddanda C Ponnappa; Fiscal Year: 2010..In this study, we describe a systematic set of experiments aimed at optimizing fibrogenesis-specific radiotracers for SPECT/MRI and PET/MRI imaging, with the goal being their rapid translation to the clinic. ..
- Annual Estimates of Influenza Vaccine Effectiveness for Preventing Laboratory-ConArnold S Monto; Fiscal Year: 2010....
- Association between clinical decision support systems and health care disparitiesJORDAN MITCHELL; Fiscal Year: 2011..Policy makers will be able to use the results of this study to strengthen the case for fully functional electronic medical record (EMR) systems that include clinical decision support systems (CDSS). ..
- Advancing Spatial Evaluation Methods to Improve Healthcare Efficiency and QualityLuc Anselin; Fiscal Year: 2013..b>Selection bias is prevalent, as the elderly selectively enroll in managed care plans, which were significantly impacted by ..
- Do Amputees Benefit from Comprehensive Rehabilitation ServicesMargaret Grace Stineman; Fiscal Year: 2012..65 years of age and older using propensity score matching and instrumental variable analyses to adjust for selection bias and mixed models to account for patient clustering within facilities...
- Position Sensitive P-Mer Frequency Clustering with Applications to ClassificationMonnie McGee; Fiscal Year: 2012..selection of one representative sequence (as is typically done when looking at 16S rRNA data) which introduces selection bias. Genomic databases involving multiple copies of 16S per organism across thousands of organisms, will soon grow ..
- Anticholinergics and Cognitive Decline in the Elderly with DepressionRajender R Aparasu; Fiscal Year: 2013..The study will involve a multiple propensity score approach to adjust for the selection bias across anticholinergic levels within the multivariate context of the Andersen Behavioral Model...
- Evaluate a Peer Counseling Program to Promote Breastfeeding in WIC ParticipantsTheodore J Joyce; Fiscal Year: 2013..This will provide the first estimates of selection bias associated with a peer counseling intervention based on observational data...
- Comparative Effectiveness of Surgical Treatments for Lung Cancer in the ElderlyJuan P Wisnivesky; Fiscal Year: 2013..statistical methods (propensity scores, instrumental variable, and sensitivity analyses) to control for selection bias. This study will fill an important gap in knowledge regarding the effectiveness of several surgical treatments ..
- Molecular Imaging Directed, 3D Ultrasound-guided, Biopsy SystemBaowei Fei; Fiscal Year: 2013..If completely developed, the multimodality molecular image-guided system will be able to be used not only for biopsy but also for brachytherapy, radiofrequency thermal ablation, cryotherapy, and photodynamic therapy. ..
- Experimental Estimation of Neighborhood Effects on Health and Well-BeingLAWRENCE F KATZ; Fiscal Year: 2013..4. Examine if there is important heterogeneity in neighborhood effects on adult self-sufficiency, health, and well-being by the characteristics of MTO individuals or their families. ..
- Cardiac care in specialty and general hospitalsPeter M Cram; Fiscal Year: 2010..Three complementary methods will be used to minimize selection bias (hierarchcial linear models, propensity scores, and instrumental variables) and adjust for important patient-..
- Computer-assisted Grading and Risk Stratification of Follicular LymphomaMETIN NAFI GURCAN; Fiscal Year: 2012..Since only ten HPFs are used by the pathologist for practical reasons, this system may be prone to selection bias in cases that show significant differences in various areas of a section...
- A Natural Experiment of College-Ready Programs on Health Among Low SES MinoritiesMITCHELL DAVID WONG; Fiscal Year: 2010..While these results may seem too good to have occurred without some selection bias, Alliance schools have more minority students, English-learners, students on free/reduced lunch, and parents ..
- Mothers Gains in Postsecondary Education and Childrens DevelopmentMARGO MICHELLE GARDNER; Fiscal Year: 2013..To overcome the threat of selection bias, propensity score matching will be used...
- Improving adolescent and adult mortality data in developing countriesStephane Helleringer; Fiscal Year: 2012..If successful, the proposed SELC will constitute a new approach to eliciting retrospective mortality data that can be tested on a larger scale and possibly incorporated in national surveys of adult mortality (e.g., DHS). ..
- Circumcision: HIV/STIs and behaviors in a RCT and post-RCT surveillance;RakaiRonald H Gray; Fiscal Year: 2011..behavioral data available on NIH-trial and RCCS participants facilitate adjustment for possible selection bias. Qualitative research will also be conducted to enhance interpretation of findings...
- MRI-BASED VIRTUAL BONE BIOPSY IN RENAL OSTEODYSTROPHYFelix Wehrli; Fiscal Year: 2001..The development of a noninvasive technique to assess cortical and trabecular structure in ROD will facilitate studies of the prevention, treatment and assessment of the biomechanical implications of this prevalent disease. ..
- Etiology, Epidemiology, and Clinical Outcomes of Health Care Associated PneumoniaKarl Madaras Kelly; Fiscal Year: 2009..Propensity score matching will be used to adjust for potential confounding and selection bias associated with non-random treatment allocation...
- A LONGITUDINAL STUDY OF MUSKULOSKELETAL DISORDERSLaura Punnett; Fiscal Year: 1990..of upper extremity soft tissue disorders as a function of exposure; (2) to estimate the magnitude of the selection bias resulting from symptomatic workers leaving the workplace; (3) to estimate the long-term and short- term ..
- Aspirin, Helicobacter Pylori, and Peptic Ulcer DiseaseEdward Lew; Fiscal Year: 2003..data on the ulcer risks associated with both factors but they have been limited by recall bias of aspirin use, selection bias, and small sample sizes with short follow-up...
- Aspiration Pneumonia in Children with Neurological ImpairmentRajendu Srivastava; Fiscal Year: 2009..morbidity and resource utilization differences and employs statistical methodology to account for possible selection bias. Study 2 is a prospective observational cohort study, comparing quality of life outcomes over time following ..
- Long Term Outcome for Liver Transplantation for Hepatocellular CarcinomaRichard B Freeman; Fiscal Year: 2010..survival and survival benefit for LT in HCC patients compared with other indications and the degree to which selection bias may be affecting overall results, control for this selection bias with sophisticated statistical techniques, ..
- CLONING HIV-1-NEUTRALIZING FABS FROM LN TISSUE SECTIONSDavid Margolin; Fiscal Year: 2000....
- Predictors and Outcomes of Pneumonia after StrokeIrene Katzan; Fiscal Year: 2007..Regression analyses will be performed with adjustments for both susceptibility and selection bias. To evaluate Primary Aims 3 and 4, a supplemental chart review will be performed for each case and control in ..
- INFANT FEEDING METHOD AND MEDICAID SERVICE UTILIZATIONAYLIN RIEDEL; Fiscal Year: 1999..This research has also suffered from small sample sizes and has not adequately controlled for the selection bias and confounding factors inherent in the modeling of breast feeding outcomes...
- CENTRAL NERVOUS SYSTEM EFFECTS OF PCE EXPOSURE IN HUMANSDiana Echeverria; Fiscal Year: 1992..To estimate the degree of potential job selection bias in testing healthy workers, 42 previously exposed workers will also be followed-up from 10-year old employment ..
- MOLECULAR SUSCEPTIBILITY TO HORMONE INDUCED CANCERBRIAN STROM; Fiscal Year: 2002..important advantages over other types of case-control studies, especially by limiting the possibility of selection bias, the major disadvantage of a non-population-based case-control study...
- METHODS FOR EVALUATING THE VALIDITY OF GIS STUDIESGeorge Maldonado; Fiscal Year: 2001..due to the use of an invalid comparison group, information bias due to measurement or classification error, selection bias, due to invalid methods of selecting subjects or subject non response, follow-up bias due to losses to follow-..
- Controlling for Endogeneity Biases in Estimating AA Effects on Drinking OutcomesStephen Magura; Fiscal Year: 2010..One such artifact is self-selection bias, i.e., where different types of people choose to participate or not participate in AA...
- Access to Medicare Hospice for Nursing Home ResidentsPedro Gozalo; Fiscal Year: 2001..This project, and subsequent work, will be important to policymakers for monitoring hospice care provision and for deciding on future changes in the administration of the Medicare hospice benefit. ..