Christopher H Schmid

Summary

Affiliation: Tufts-New England Medical Center
Country: USA

Publications

  1. ncbi request reprint Meta-regression detected associations between heterogeneous treatment effects and study-level, but not patient-level, factors
    Christopher H Schmid
    Institute for Clinical Research and Health Policy Studies, Tufts New England Medical Center and Tufts University School of Medicine, 750 Washington Street, Boston, MA 02111, USA
    J Clin Epidemiol 57:683-97. 2004
  2. pmc Interferon for hepatitis C virus in hemodialysis--an individual patient meta-analysis of factors associated with sustained virological response
    Craig E Gordon
    Division of Nephrology, Department of Medicine, Tufts Medical Center, Boston, Massachusetts, USA
    Clin J Am Soc Nephrol 4:1449-58. 2009
  3. pmc A new equation to estimate glomerular filtration rate
    Andrew S Levey
    Tufts Medical Center, Boston, Massachusetts 02111, USA
    Ann Intern Med 150:604-12. 2009
  4. ncbi request reprint Association of estrogen receptor beta gene polymorphisms with left ventricular mass and wall thickness in women
    Inga Peter
    Biostatistics Research Center, Institute for Clinical Research and Health Policy Studies, Tufts New England Medical Center, Boston, Massachusetts 02111, USA
    Am J Hypertens 18:1388-95. 2005
  5. ncbi request reprint Factors other than glomerular filtration rate affect serum cystatin C levels
    Lesley A Stevens
    Division of Nephrology, Clinical Care Research, Tufts Medical Center, Boston, Massachusetts 02111, USA
    Kidney Int 75:652-60. 2009
  6. ncbi request reprint Age-related changes in echocardiographic measurements: association with variation in the estrogen receptor-alpha gene
    Inga Peter
    Institute for Clinical Research and Health Policy Studies, Tufts New England Medical Center, Boston, MA 02111, USA
    Hypertension 49:1000-6. 2007
  7. doi request reprint Changes in dietary protein intake has no effect on serum cystatin C levels independent of the glomerular filtration rate
    Navdeep Tangri
    Division of Nephrology, Department of Medicine, Tufts Medical Center, Boston, Massachusetts 02111, USA
    Kidney Int 79:471-7. 2011
  8. pmc Risk factors for proteinuria in HIV-infected and -uninfected Hispanic drug users
    Martin S Rhee
    Department of Medicine, Division of Geographic Medicine and Infectious Diseases, Tufts Medical Center, Boston, MA 02111, USA
    Am J Kidney Dis 52:683-90. 2008
  9. pmc Tai Chi is effective in treating knee osteoarthritis: a randomized controlled trial
    Chenchen Wang
    Division of Rheumatology, Tufts Medical Center, Box 406, Tufts University School of Medicine, Boston, MA 02111, USA
    Arthritis Rheum 61:1545-53. 2009
  10. pmc Comparative performance of the CKD Epidemiology Collaboration (CKD-EPI) and the Modification of Diet in Renal Disease (MDRD) Study equations for estimating GFR levels above 60 mL/min/1.73 m2
    Lesley A Stevens
    Tufts Medical Center, Boston, MA 02111, USA
    Am J Kidney Dis 56:486-95. 2010

Detail Information

Publications71

  1. ncbi request reprint Meta-regression detected associations between heterogeneous treatment effects and study-level, but not patient-level, factors
    Christopher H Schmid
    Institute for Clinical Research and Health Policy Studies, Tufts New England Medical Center and Tufts University School of Medicine, 750 Washington Street, Boston, MA 02111, USA
    J Clin Epidemiol 57:683-97. 2004
    ..Two investigations evaluate Bayesian meta-regression for detecting treatment interactions...
  2. pmc Interferon for hepatitis C virus in hemodialysis--an individual patient meta-analysis of factors associated with sustained virological response
    Craig E Gordon
    Division of Nephrology, Department of Medicine, Tufts Medical Center, Boston, Massachusetts, USA
    Clin J Am Soc Nephrol 4:1449-58. 2009
    ..The authors aimed to identify factors associated with SVR in hemodialysis patients through analysis of individual patient data obtained from systematic review of published literature...
  3. pmc A new equation to estimate glomerular filtration rate
    Andrew S Levey
    Tufts Medical Center, Boston, Massachusetts 02111, USA
    Ann Intern Med 150:604-12. 2009
    ..Equations to estimate glomerular filtration rate (GFR) are routinely used to assess kidney function. Current equations have limited precision and systematically underestimate measured GFR at higher values...
  4. ncbi request reprint Association of estrogen receptor beta gene polymorphisms with left ventricular mass and wall thickness in women
    Inga Peter
    Biostatistics Research Center, Institute for Clinical Research and Health Policy Studies, Tufts New England Medical Center, Boston, Massachusetts 02111, USA
    Am J Hypertens 18:1388-95. 2005
    ..Given sex-based differences in cardiac structure and remodeling, we hypothesized that variation in estrogen pathway genes might be associated with alteration of LV structure...
  5. ncbi request reprint Factors other than glomerular filtration rate affect serum cystatin C levels
    Lesley A Stevens
    Division of Nephrology, Clinical Care Research, Tufts Medical Center, Boston, Massachusetts 02111, USA
    Kidney Int 75:652-60. 2009
    ..Hence, we found that cystatin C is affected by factors other than GFR which should be considered when the GFR is estimated using serum levels of cystatin C...
  6. ncbi request reprint Age-related changes in echocardiographic measurements: association with variation in the estrogen receptor-alpha gene
    Inga Peter
    Institute for Clinical Research and Health Policy Studies, Tufts New England Medical Center, Boston, MA 02111, USA
    Hypertension 49:1000-6. 2007
    ..Understanding the mechanisms predisposing to unfavorable LV remodeling of the heart with advancing age may aid in the discovery of new therapeutic targets for the prevention of heart failure...
  7. doi request reprint Changes in dietary protein intake has no effect on serum cystatin C levels independent of the glomerular filtration rate
    Navdeep Tangri
    Division of Nephrology, Department of Medicine, Tufts Medical Center, Boston, Massachusetts 02111, USA
    Kidney Int 79:471-7. 2011
    ..Hence, cystatin C may allow more accurate estimates of GFR than creatinine for patients with reduced protein intake. Further study of other non-GFR determinants of cystatin C is needed before the widespread adoption...
  8. pmc Risk factors for proteinuria in HIV-infected and -uninfected Hispanic drug users
    Martin S Rhee
    Department of Medicine, Division of Geographic Medicine and Infectious Diseases, Tufts Medical Center, Boston, MA 02111, USA
    Am J Kidney Dis 52:683-90. 2008
    ..Minorities are at greater risk of chronic kidney disease. Data are limited about risk factors for proteinuria in Hispanic drug users with and without HIV infection...
  9. pmc Tai Chi is effective in treating knee osteoarthritis: a randomized controlled trial
    Chenchen Wang
    Division of Rheumatology, Tufts Medical Center, Box 406, Tufts University School of Medicine, Boston, MA 02111, USA
    Arthritis Rheum 61:1545-53. 2009
    ..To evaluate the effectiveness of Tai Chi in the treatment of knee osteoarthritis (OA) symptoms...
  10. pmc Comparative performance of the CKD Epidemiology Collaboration (CKD-EPI) and the Modification of Diet in Renal Disease (MDRD) Study equations for estimating GFR levels above 60 mL/min/1.73 m2
    Lesley A Stevens
    Tufts Medical Center, Boston, MA 02111, USA
    Am J Kidney Dis 56:486-95. 2010
    ..Here, performance of a more accurate GFR-estimating equation, the Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) equation, is reported by level of GFR and clinical characteristics...
  11. ncbi request reprint The effect of angiotensin-converting-enzyme inhibitors on progression of advanced polycystic kidney disease
    Tazeen H Jafar
    Division of Nephrology, New England Medical Center, Boston, Massachusetts, USA
    Kidney Int 67:265-71. 2005
    ..We performed a patient-level meta-analysis to compare the effect of antihypertensive regimens, including ACE inhibitors, to those without ACE inhibitors (controls) on kidney disease progression in patients with PKD...
  12. ncbi request reprint Estimating glomerular filtration rate from serum creatinine and cystatin C
    Lesley A Inker
    Division of Nephrology, Tufts Medical Center, 800 Washington St, Box 391, Boston, MA 02111, USA
    N Engl J Med 367:20-9. 2012
    ..Cystatin C is an alternative filtration marker for estimating GFR...
  13. pmc A randomized trial of tai chi for fibromyalgia
    Chenchen Wang
    Division of Rheumatology, Tufts Medical Center, Tufts University School of Medicine, Boston, MA 02111, USA
    N Engl J Med 363:743-54. 2010
    ..Previous research has suggested that tai chi offers a therapeutic benefit in patients with fibromyalgia...
  14. ncbi request reprint Progression of chronic kidney disease: the role of blood pressure control, proteinuria, and angiotensin-converting enzyme inhibition: a patient-level meta-analysis
    Tazeen H Jafar
    Tufts New England Medical Center, Boston, Massachusetts 02111, USA
    Ann Intern Med 139:244-52. 2003
    ..Angiotensin-converting enzyme (ACE) inhibitors reduce blood pressure and urine protein excretion and slow the progression of chronic kidney disease...
  15. ncbi request reprint The rate of progression of renal disease may not be slower in women compared with men: a patient-level meta-analysis
    Tazeen H Jafar
    New England Medical Center, Tufts University School of Medicine, Boston, MA, USA
    Nephrol Dial Transplant 18:2047-53. 2003
    ..Therefore, we undertook this analysis to explore the independent association of renal disease progression with gender...
  16. pmc Accuracy of a GFR estimating equation over time in people with a wide range of kidney function
    Smita Padala
    Tufts Medical Center, Boston, MA 02111, USA
    Am J Kidney Dis 60:217-24. 2012
    ..GFR estimates from serum creatinine level provide an unbiased but imprecise estimate of GFR at single time points. However, the accuracy of estimated GFR over time is not well known...
  17. ncbi request reprint Evaluation of the modification of diet in renal disease study equation in a large diverse population
    Lesley A Stevens
    Division of Nephrology, Tufts New England Medical Center, 750 Washington Street, Box 391, Boston, MA 02111, USA
    J Am Soc Nephrol 18:2749-57. 2007
    ..73 m(2). In individual patients, interpretation of GFR estimates near 60 ml/min per 1.73 m(2) should be interpreted with caution to avoid misclassification of chronic kidney disease in the context of the clinical setting...
  18. pmc Development and validation of GFR-estimating equations using diabetes, transplant and weight
    Lesley A Stevens
    Tufts Medical Center, Boston, MA, USA
    Nephrol Dial Transplant 25:449-57. 2010
    ..Here, we describe the development and validation of this equation as well as other equations that incorporate diabetes, transplant and weight as additional predictor variables...
  19. pmc Estimating GFR using serum cystatin C alone and in combination with serum creatinine: a pooled analysis of 3,418 individuals with CKD
    Lesley A Stevens
    Division of Nephrology, Tufts New England Medical Center, 750 Washington St, Box 391, Boston, MA 02111, USA
    Am J Kidney Dis 51:395-406. 2008
    ..We report the development and evaluation of GFR-estimating equations using serum cystatin C alone and serum cystatin C, serum creatinine, or both with demographic variables...
  20. pmc Individual (N-of-1) trials can be combined to give population comparative treatment effect estimates: methodologic considerations
    Deborah R Zucker
    Institute for Clinical Research and Health Policy Studies, Tufts Medical Center, Tufts University, 800 Washington Street, Boston, MA 02111, USA
    J Clin Epidemiol 63:1312-23. 2010
    ..To compare different statistical models for combining N-of-1 trials to estimate a population treatment effect...
  21. pmc Long-term viral negativity after interferon for chronic hepatitis C virus infection in hemodialysis
    Craig E Gordon
    Renal Section, Boston University Medical Center, Boston, MA 02118, USA
    Clin J Am Soc Nephrol 6:2226-34. 2011
    ..We analyzed the rate of long-term virological negativity in hemodialysis patients who achieved SVR after IFN or pegylated-IFN through analysis of patient-level data...
  22. doi request reprint Evaluation of the Chronic Kidney Disease Epidemiology Collaboration equation for estimating the glomerular filtration rate in multiple ethnicities
    Lesley A Stevens
    Division of Nephrology, Tufts Medical Center, Boston, Massachusetts 02111, USA
    Kidney Int 79:555-62. 2011
    ..Thus, heterogeneity in performance among the ethnic and geographic groups precludes use of the four-level race equation. The CKD-EPI two-level race equation can be used in the United States and Europe across a wide range of ethnicity...
  23. ncbi request reprint Evaluating the performance of equations for estimating glomerular filtration rate
    Lesley A Stevens
    Tufts University School of Medicine, Tufts Medical Center, 800 Washington Street, Box 391 Boston, MA 02111, USA
    J Nephrol 21:797-807. 2008
    ....
  24. ncbi request reprint Variation in estrogen-related genes and cross-sectional and longitudinal blood pressure in the Framingham Heart Study
    Inga Peter
    Biostatistics Research Center, Institute for Clinical Research and Health Policy Studies, Massachusetts Institute of Technology, Cambridge, MA, USA
    J Hypertens 23:2193-200. 2005
    ..To examine the association between variation in estrogen-related genes and cross-sectional and longitudinal blood pressure in men and women...
  25. pmc Comparison of drug dosing recommendations based on measured GFR and kidney function estimating equations
    Lesley A Stevens
    Division of Nephrology, Tufts Medical Center, Boston, MA 02111, USA
    Am J Kidney Dis 54:33-42. 2009
    ....
  26. ncbi request reprint External validity of predictive models: a comparison of logistic regression, classification trees, and neural networks
    Norma Terrin
    Division of Clinical Care Research, Department of Medicine, Tufts New England Medical Center, and Tufts University School of Medicine, 750 Washington Street, Boston, MA 02111, USA
    J Clin Epidemiol 56:721-9. 2003
    ..We report a simulation study that compared the external validity of standard logistic regression (LR1), logistic regression with piecewise-linear and quadratic terms (LR2), classification trees, and neural networks (NNETs)...
  27. ncbi request reprint Constructing a database of individual clinical trials for longitudinal analysis
    Christopher H Schmid
    Biostatistics Research Center, Division of Clinical Care Research, Department of Medicine, New England Medical Center Box 63, 750 Washington Street, Boston, MA 02111, USA
    Control Clin Trials 24:324-40. 2003
    ..Funding agencies must be encouraged to provide support to collaborative groups combining databases...
  28. pmc Performance of creatinine and cystatin C GFR estimating equations in an HIV-positive population on antiretrovirals
    Lesley A Inker
    Tufts Medical Center, Boston, MA, USA
    J Acquir Immune Defic Syndr 61:302-9. 2012
    ..To evaluate the performance of Chronic Kidney Disease Epidemiology Collaboration (CKD-EPI) creatinine, cystatin C, and creatinine-cystatin C estimating equations in HIV-positive patients...
  29. pmc Tai Chi for treating knee osteoarthritis: designing a long-term follow up randomized controlled trial
    Chenchen Wang
    Division of Rheumatology, Tufts Medical Center, Tufts University School of Medicine, Boston, MA, USA
    BMC Musculoskelet Disord 9:108. 2008
    ..The study will be completed by July 2009...
  30. ncbi request reprint In an empirical evaluation of the funnel plot, researchers could not visually identify publication bias
    Norma Terrin
    Institute for Clinical Research and Health Policy Studies, Tufts New England Medical Center, 750 Washington Street, Box 63, Boston, MA 02111, USA
    J Clin Epidemiol 58:894-901. 2005
    ..We sought to determine whether researchers can correctly identify publication bias from visual inspection of funnel plots in typical-size systematic reviews...
  31. ncbi request reprint Impact of creatinine calibration on performance of GFR estimating equations in a pooled individual patient database
    Lesley A Stevens
    Division of Nephrology, Tufts New England Medical Center, 750 Washington St, Box 391, Boston, MA 02111, USA
    Am J Kidney Dis 50:21-35. 2007
    ..Variation in performance of glomerular filtration rate (GFR) estimating equations is related to variation in calibration of the creatinine assay across clinical laboratories...
  32. pmc Genotype misclassification in genetic association studies of the rs1042522 TP53 (Arg72Pro) polymorphism: a systematic review of studies of breast, lung, colorectal, ovarian, and endometrial cancer
    Issa J Dahabreh
    Center for Clinical Evidence Synthesis, Institute for Clinical Research and Health Policy Studies, Tufts Medical Center, Boston, Massachusetts, USA
    Am J Epidemiol 177:1317-25. 2013
    ..Use of tumor tissue as the source of genotyping material for cases is associated with significant bias in the estimate of the genetic effect in cancer genetic association studies...
  33. pmc Toward modernizing the systematic review pipeline in genetics: efficient updating via data mining
    Byron C Wallace
    Institute for Clinical Research and Health Policy Studies, Tufts Medical Center, Boston, MA, USA
    Genet Med 14:663-9. 2012
    ..The aim of this study was to demonstrate that modern data mining tools can be used as one step in reducing the labor necessary to produce and maintain systematic reviews...
  34. pmc Nephrotic syndrome in diabetic kidney disease: an evaluation and update of the definition
    Nicholas Stoycheff
    Division of Nephrology, Tufts Medical Center, Boston, MA 02111, USA
    Am J Kidney Dis 54:840-9. 2009
    ..These threshold levels have not been rigorously evaluated in patients with diabetic kidney disease or by using urine albumin excretion, the preferred measure of proteinuria in patients with diabetes...
  35. ncbi request reprint Bayesian methods to improve sample size approximations
    Christopher H Schmid
    Institute for Clinical Research and Health Policy Studies, Tufts New England Medical Center, Boston, Massachusetts 02111, USA
    Methods Enzymol 383:406-27. 2004
  36. pmc Why clinicians are natural bayesians
    Christopher J Gill
    Center for International Health and Development, Department of International Health, Boston University School of Public Health, Boston, MA 02118, USA
    BMJ 330:1080-3. 2005
  37. ncbi request reprint Adjusting for publication bias in the presence of heterogeneity
    Norma Terrin
    Division of Clinical Care Research, New England Medical Center, Boston, MA 02111, USA
    Stat Med 22:2113-26. 2003
    ..Selection modelling is an alternative method warranting further study. It performed better than trim and fill in our simulations, although its frequency of convergence varied, depending on the simulation parameters...
  38. pmc The case of the misleading funnel plot
    Joseph Lau
    Institute for Clinical Research and Health Policy Studies, Tufts New England Medical Center, Boston, MA 02111, USA
    BMJ 333:597-600. 2006
  39. ncbi request reprint Lessons learned combining N-of-1 trials to assess fibromyalgia therapies
    Deborah R Zucker
    Tufts University School of Medicine and Tufts New England Medical Center, Boston, Massachusetts 02111, USA
    J Rheumatol 33:2069-77. 2006
    ..We combined N-of-1 trials to compare fibromyalgia therapies and to assess the feasibility and outcomes of this approach for practice-based effectiveness research...
  40. doi request reprint Interferon treatment in hemodialysis patients with chronic hepatitis C virus infection: a systematic review of the literature and meta-analysis of treatment efficacy and harms
    Craig E Gordon
    Division of Nephrology, Institute for Clinical Research and Health Policy Studies, Tufts New England Medical Center, Boston, MA 02111, USA
    Am J Kidney Dis 51:263-77. 2008
    ..We determined the efficacy and harms of interferon (IFN) and pegylated IFN (PEG-IFN) treatment of hemodialysis patients with chronic HCV infection and identified factors associated with these outcomes...
  41. pmc Tai Chi on psychological well-being: systematic review and meta-analysis
    Chenchen Wang
    Division of Rheumatology, Tufts Medical Center, Tufts University School of Medicine, Boston, Massachusetts, USA
    BMC Complement Altern Med 10:23. 2010
    ..However, the quantitative effects of Tai Chi on psychological well-being have rarely been examined. We systematically reviewed the effects of Tai Chi on stress, anxiety, depression and mood disturbance in eastern and western populations...
  42. pmc Heterogeneity of the phenotypic definition of coronary artery disease and its impact on genetic association studies
    Georgios D Kitsios
    Institute for Clinical Research and Health Policy Studies, Tufts Medical Center and Sackler School of Graduate Biomedical Sciences, Tufts University, Boston, MA 02111, USA
    Circ Cardiovasc Genet 4:58-67. 2011
    ..We assessed the extent of phenotypic heterogeneity and quantified its impact in a large literature sample of association studies...
  43. pmc Is primary angioplasty for some as good as primary angioplasty for all?
    David M Kent
    Received from the Division of Clinical Care Research, Department of Medicine, Tufts New England Medical Center, Boston, Mass 02111, USA
    J Gen Intern Med 17:887-94. 2002
    ..To investigate whether proper patient selection might allow most of the benefits of population-wide primary coronary angioplasty to be captured in a subgroup of high-risk patients...
  44. pmc Meta-Analyst: software for meta-analysis of binary, continuous and diagnostic data
    Byron C Wallace
    Center for Clinical Evidence Synthesis, Institute for Clinical Research and Health Policy Studies, Tufts Medical Center, Boston, MA 02111, USA
    BMC Med Res Methodol 9:80. 2009
    ..In practice, most meta-analyses are performed in general statistical packages or dedicated meta-analysis programs...
  45. pmc Drug use and other risk factors related to lower body mass index among HIV-infected individuals
    Lien A Quach
    Tufts University School of Medicine, Boston, MA 02111, USA
    Drug Alcohol Depend 95:30-6. 2008
    ..BMI was also directly associated with CD4 count and inversely related to age more than 55 years old. HIV-infected cocaine users may be at higher risk of developing malnutrition, suggesting the need for anticipatory nutritional support...
  46. ncbi request reprint Time-dependent predictors of primary cardiac arrest in patients with acute myocardial infarction
    Harry P Selker
    Center for Cardiovascular Health Services Research, Division of Clinical Care Research, Department of Medicine, Tufts New England Medical Center and Tufts University School of Medicine, Boston, Massachusetts 02111, USA
    Am J Cardiol 91:280-6. 2003
    ..Those with prolonged QTc or substantial ST elevation who survive the initial 1.5-hour period are those less susceptible to these risks...
  47. ncbi request reprint Correlation of quality measures with estimates of treatment effect in meta-analyses of randomized controlled trials
    Ethan M Balk
    Evidence Based Practice Center, Division of Clinical Care Research, Tufts University School of Medicine, New England Medical Center, 750 Washington St, No 63, Boston, MA 02111, USA
    JAMA 287:2973-82. 2002
    ..Therefore, assessment of trial quality is often used in meta-analysis. However, the degree to which specific quality measures are associated with treatment effects has not been well established across a broad range of clinical areas...
  48. doi request reprint Loss to analysis in randomized controlled trials in CKD
    Aneet Deo
    Division of Nephrology, Department of Medicine, Tufts Medical Center, Boston, MA 02111, USA
    Am J Kidney Dis 58:349-55. 2011
    ..Nephrology has a limited number of randomized controlled trials (RCTs). The quality of randomized trials is compromised further when not all participants randomly assigned are accounted for transparently...
  49. doi request reprint Directed acyclic graphs can help understand bias in indirect and mixed treatment comparisons
    Jeroen P Jansen
    Mapi Group, Boston, MA 02114, USA
    J Clin Epidemiol 65:798-807. 2012
    ..To introduce and advocate directed acyclic graphs (DAGs) as a useful tool to understand when indirect and mixed treatment comparisons are invalid and guide strategies that limit bias...
  50. ncbi request reprint Ethnic subgroup differences in hypertension in Pakistan
    Tazeen H Jafar
    Department of Community Health Sciences, Tufts University Medical School, Boston, Massachusetts, USA
    J Hypertens 21:905-12. 2003
    ..We conducted this study to explore the variations in hypertension within ethnic subgroups among South Asians...
  51. ncbi request reprint Changes in barometric pressure and ambient temperature influence osteoarthritis pain
    Tim McAlindon
    Division of Rheumatology, Tufts New England Medical Center, Boston, Mass 02111, USA
    Am J Med 120:429-34. 2007
    ..Individuals with osteoarthritis often assert that change in the weather influences their pain, but the evidence is inconclusive. Our objective was to determine if short-term weather parameters influence knee osteoarthritis pain...
  52. doi request reprint Therapeutic trajectory of hyaluronic acid versus corticosteroids in the treatment of knee osteoarthritis: a systematic review and meta-analysis
    Raveendhara R Bannuru
    Tufts University School of Medicine, Boston, MA, USA
    Arthritis Rheum 61:1704-11. 2009
    ..To compare the efficacy of intraarticular hyaluronic acid with corticosteroids for knee osteoarthritis (OA)...
  53. doi request reprint Antibiotic exposure and room contamination among patients colonized with vancomycin-resistant enterococci
    Marci Drees
    Tufts Medical Center, Tufts University, Boston, Massachusetts, USA
    Infect Control Hosp Epidemiol 29:709-15. 2008
    ..To determine whether total and antianaerobic antibiotic exposure increases the risk of room contamination among vancomycin-resistant enterococci (VRE)-colonized patients...
  54. ncbi request reprint Intersite differences in weight growth velocity of extremely premature infants
    Irene E Olsen
    Departments of Nutrition, Beth Israel Deaconess Medical Center, Boston, Massachusetts, USA
    Pediatrics 110:1125-32. 2002
    ..To explain differences in weight growth velocity of extremely premature infants among 6 level III neonatal intensive care units (NICUs)...
  55. ncbi request reprint The impact of early transfer bias in a growth study among neonatal intensive care units
    Irene E Olsen
    Department of Nutrition, Beth Israel Deaconess Medical Center, 330 Brookline Avenue, Boston, MA 02212, USA
    J Clin Epidemiol 56:998-1005. 2003
    ..This study attempts to show the potential size of transfer bias in the context of a large cohort study and describe strategies for minimizing this type of bias...
  56. ncbi request reprint Efficacy of pharmacotherapy for weight loss in adults with type 2 diabetes mellitus: a meta-analysis
    Susan L Norris
    Division of Diabetes Translation, National Center for Chronic Disease Prevention and Health Promotion, Centers for Disease Control and Prevention, Atlanta, GA 30341, USA
    Arch Intern Med 164:1395-404. 2004
    ..The objective of this review was to assess the efficacy of pharmacotherapy for weight loss in adults with type 2 diabetes...
  57. ncbi request reprint Tobacco smoking, estrogen receptor alpha gene variation and small low density lipoprotein level
    Amanda M Shearman
    Center for Cancer Research, Massachusetts Institute of Technology, Cambridge, MA 02139, USA
    Hum Mol Genet 14:2405-13. 2005
    ..454-397 T and c.454-351 A alleles with increased myocardial infarction and ischaemic heart disease, independent of the standard, established cardiovascular risk factors...
  58. ncbi request reprint Estrogen receptor-alpha variants are associated with lipoprotein size distribution and particle levels in women: the Framingham Heart Study
    Serkalem Demissie
    Department of Biostatistics, Boston University School of Public Health, 715 Albany Street, TE425 Boston, MA 02118, USA
    Atherosclerosis 185:210-8. 2006
    ..30T-c.454-397T-c.454-351A haplotype (frequency, 46%), where L and S are long and short TA repeats. Our results suggest that common ESR1 polymorphisms have a significant effect on lipoprotein metabolism in women...
  59. ncbi request reprint Ethnic differences and determinants of proteinuria among South Asian subgroups in Pakistan
    Tazeen H Jafar
    Department of Medicine, Aga Khan University, Karachi, Pakistan
    Kidney Int 64:1437-44. 2003
    ..Prevalence of proteinuria is high in South Asians. However, ethnic subgroup differences and determinants of proteinuria within the South Asian population have not been explored...
  60. ncbi request reprint Individual patient- versus group-level data meta-regressions for the investigation of treatment effect modifiers: ecological bias rears its ugly head
    Jesse A Berlin
    University of Pennsylvania School of Medicine, Department of Biostatistics and Epidemiology and Center for Clinical Epidemiology and Biostatistics, Philadelphia, PA 19104 6021, USA
    Stat Med 21:371-87. 2002
    ..We recommend using individual patient data, when feasible, to study patient characteristics, in order to avoid the potential for ecological bias introduced by group-level analyses...
  61. ncbi request reprint Serum creatinine as marker of kidney function in South Asians: a study of reduced GFR in adults in Pakistan
    Tazeen H Jafar
    Section of Nephrology, Department of Medicine, Clinical Epidemiology Unit, The Aga Khan University, P O Box 3500, Stadium Road, Karachi Sind 74800, Pakistan
    J Am Soc Nephrol 16:1413-9. 2005
    ..Inclusion of terms for ethnic and racial groups other than white and black might improve the performance of GFR estimating equations...
  62. ncbi request reprint Children in South Asia have higher body mass-adjusted blood pressure levels than white children in the United States: a comparative study
    Tazeen H Jafar
    Clinical Epidemiology Unit, Department of Community Health Sciences, Aga Khan University, PO Box 3500, Stadium Road, Karachi, Pakistan
    Circulation 111:1291-7. 2005
    ....
  63. ncbi request reprint Association between estrogen receptor alpha gene variation and cardiovascular disease
    Amanda M Shearman
    Center for Cancer Research, Massachusetts Institute of Technology, Cambridge, Mass 02139, USA
    JAMA 290:2263-70. 2003
    ..Relatively little is known, however, about the impact of genetic variation in estrogen receptor alpha (ESR1) on CVD risk...
  64. ncbi request reprint Maternal obesity and risk of gestational diabetes mellitus
    Susan Y Chu
    Division of Reproductive Health, Centers for Disease Control and Prevention, Mailstop K 23, 1600 Clifton Rd, Atlanta, GA 30333, USA
    Diabetes Care 30:2070-6. 2007
    ..This meta-analysis was conducted to better estimate this risk and to explore differences across studies...
  65. ncbi request reprint Self-management education for adults with type 2 diabetes: a meta-analysis of the effect on glycemic control
    Susan L Norris
    Division of Diabetes Translation, National Center for Chronic Disease Prevention and Health Promotion, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
    Diabetes Care 25:1159-71. 2002
    ..To evaluate the efficacy of self-management education on GHb in adults with type 2 diabetes...
  66. ncbi request reprint Dose requirements among hemodialysis patients treated with darbepoetin-alpha or epoetin-beta
    M Martins Prata
    Gambro Healthcare, Sintra, Portugal
    Nephron Clin Pract 107:c50-5. 2007
    ....
  67. ncbi request reprint Effect of angiotensin-converting enzyme inhibitors on progression of nondiabetic renal disease
    Tazeen H Jafar
    Ann Intern Med 137:298-9. 2002
  68. ncbi request reprint Long-term effectiveness of lifestyle and behavioral weight loss interventions in adults with type 2 diabetes: a meta-analysis
    Susan L Norris
    Divisions of Diabetes Translation, National Center for Chronic Disease Prevention and Health Promotion, Centers for Disease Control and Prevention, Atlanta, Georgia, USA
    Am J Med 117:762-74. 2004
    ..Our objective was to assess the effectiveness of lifestyle and behavioral weight loss and weight control interventions in adults with type 2 diabetes...
  69. doi request reprint Prior environmental contamination increases the risk of acquisition of vancomycin-resistant enterococci
    Marci Drees
    Tufts New England Medical Center, Boston Massachusetts, USA
    Clin Infect Dis 46:678-85. 2008
    ..Patients colonized with vancomycin-resistant enterococci (VRE) frequently contaminate their environment, but the environmental role of VRE transmission remains controversial...
  70. ncbi request reprint Hospital ownership and financial performance: what explains the different findings in the empirical literature?
    Yu Chu Shen
    Graduate School of Business and Public Policy, Naval Postgraduate School, Code GB, 555 Dyer Road, Monterey, CA 93943, USA
    Inquiry 44:41-68. 2007
    ..Studies with fewer than 200 observations also produce larger point estimates and wide confidence intervals...
  71. ncbi request reprint Proteinuria in South Asian children: prevalence and determinants
    Tazeen H Jafar
    Section of Nephrology, Department of Medicine, Aga Khan University, Stadium Road, PO Box 3500, Karachi, Pakistan
    Pediatr Nephrol 20:1458-65. 2005
    ..Further studies are needed to determine factors in early life that may differentially predispose certain ethnic groups to proteinuria...