Petra Macaskill

Summary

Affiliation: University of Sydney
Country: Australia

Publications

  1. ncbi request reprint Analytic methods for comparing two dichotomous screening or diagnostic tests applied to two populations of differing disease prevalence when individuals negative on both tests are unverified
    Geoffrey Berry
    Department of Public Health and Community Medicine, Edward Ford Building A27, University of Sydney, New South Wales 2006, Australia
    Stat Med 21:853-62. 2002
  2. pmc Accuracy of reading liquid based cytology slides using the ThinPrep Imager compared with conventional cytology: prospective study
    Elizabeth Davey
    Screening and Test Evaluation Program, School of Public Health, University of Sydney, NSW 2006, Australia
    BMJ 335:31. 2007
  3. ncbi request reprint A comparison of methods to detect publication bias in meta-analysis
    P Macaskill
    Department of Public Health and Community Medicine, University of Sydney, NSW, Australia 2006
    Stat Med 20:641-54. 2001
  4. ncbi request reprint Assessing the gain in diagnostic performance when combining two diagnostic tests
    Petra Macaskill
    Screening and Test Evaluation Program STEP, Department of Public Health and Community Medicine, University of Sydney, Sydney, NSW, Australia, 2006
    Stat Med 21:2527-46. 2002
  5. ncbi request reprint Empirical Bayes estimates generated in a hierarchical summary ROC analysis agreed closely with those of a full Bayesian analysis
    Petra Macaskill
    Screening and Test Evaluation Program, School of Public Health, University of Sydney, NSW 2006, Australia
    J Clin Epidemiol 57:925-32. 2004
  6. doi request reprint Meta-analysis of magnetic resonance imaging in detecting residual breast cancer after neoadjuvant therapy
    Michael L Marinovich
    Screening and Test Evaluation Program, Sydney School of Public Health, A27, Edward Ford Building, University of Sydney, NSW 2006, Australia
    J Natl Cancer Inst 105:321-33. 2013
  7. pmc Accuracy of the "traffic light" clinical decision rule for serious bacterial infections in young children with fever: a retrospective cohort study
    Sukanya De
    Screening and Test Evaluation Program, School of Public Health, University of Sydney, Sydney 2006, Australia
    BMJ 346:f866. 2013
  8. doi request reprint Magnetic resonance imaging screening of the contralateral breast in women with newly diagnosed breast cancer: systematic review and meta-analysis of incremental cancer detection and impact on surgical management
    Meagan Elizabeth Brennan
    Screening and Test Evaluation Program, School of Public Health, Faculty of Medicine, and National Health and Medical Research Council Clinical Trials Centre, University of Sydney, Sydney, Australia
    J Clin Oncol 27:5640-9. 2009
  9. pmc The value of age and medical history for predicting colorectal cancer and adenomas in people referred for colonoscopy
    Barbara Ann Adelstein
    Prince of Wales Clinical School, Faculty of Medicine, University of New South Wales, Sydney, Australia
    BMC Gastroenterol 11:97. 2011
  10. doi request reprint Ductal carcinoma in situ at core-needle biopsy: meta-analysis of underestimation and predictors of invasive breast cancer
    Meagan E Brennan
    Screening and Test Evaluation Program, School of Public Health, Sydney Medical School, University of Sydney, Edward Ford Building, Room A27, Sydney, NSW 2006, Australia
    Radiology 260:119-28. 2011

Detail Information

Publications48

  1. ncbi request reprint Analytic methods for comparing two dichotomous screening or diagnostic tests applied to two populations of differing disease prevalence when individuals negative on both tests are unverified
    Geoffrey Berry
    Department of Public Health and Community Medicine, Edward Ford Building A27, University of Sydney, New South Wales 2006, Australia
    Stat Med 21:853-62. 2002
    ..The methods are based on the assumption that the sensitivities and specificities of the two tests, and the dependencies between the tests, are independent of prevalence. A test of goodness of fit provides a test of this...
  2. pmc Accuracy of reading liquid based cytology slides using the ThinPrep Imager compared with conventional cytology: prospective study
    Elizabeth Davey
    Screening and Test Evaluation Program, School of Public Health, University of Sydney, NSW 2006, Australia
    BMJ 335:31. 2007
    ..To compare the accuracy of liquid based cytology using the computerised ThinPrep Imager with that of manually read conventional cytology...
  3. ncbi request reprint A comparison of methods to detect publication bias in meta-analysis
    P Macaskill
    Department of Public Health and Community Medicine, University of Sydney, NSW, Australia 2006
    Stat Med 20:641-54. 2001
    ..Based on the empirical type I error rates, a regression of treatment effect on sample size, weighted by the inverse of the variance of the logit of the pooled proportion (using the marginal total) is the preferred method...
  4. ncbi request reprint Assessing the gain in diagnostic performance when combining two diagnostic tests
    Petra Macaskill
    Screening and Test Evaluation Program STEP, Department of Public Health and Community Medicine, University of Sydney, Sydney, NSW, Australia, 2006
    Stat Med 21:2527-46. 2002
    ..These methods are illustrated with an example that considers the combined use of Pap and HPV testing...
  5. ncbi request reprint Empirical Bayes estimates generated in a hierarchical summary ROC analysis agreed closely with those of a full Bayesian analysis
    Petra Macaskill
    Screening and Test Evaluation Program, School of Public Health, University of Sydney, NSW 2006, Australia
    J Clin Epidemiol 57:925-32. 2004
    ..The objective of this report is to show how the model may be fitted using the SAS procedure NLMIXED and to compare the results to the fully Bayesian analysis using an example...
  6. doi request reprint Meta-analysis of magnetic resonance imaging in detecting residual breast cancer after neoadjuvant therapy
    Michael L Marinovich
    Screening and Test Evaluation Program, Sydney School of Public Health, A27, Edward Ford Building, University of Sydney, NSW 2006, Australia
    J Natl Cancer Inst 105:321-33. 2013
    ..This meta-analysis examines MRI accuracy in detecting residual tumor, investigates variables potentially affecting MRI performance, and compares MRI with other tests...
  7. pmc Accuracy of the "traffic light" clinical decision rule for serious bacterial infections in young children with fever: a retrospective cohort study
    Sukanya De
    Screening and Test Evaluation Program, School of Public Health, University of Sydney, Sydney 2006, Australia
    BMJ 346:f866. 2013
    ....
  8. doi request reprint Magnetic resonance imaging screening of the contralateral breast in women with newly diagnosed breast cancer: systematic review and meta-analysis of incremental cancer detection and impact on surgical management
    Meagan Elizabeth Brennan
    Screening and Test Evaluation Program, School of Public Health, Faculty of Medicine, and National Health and Medical Research Council Clinical Trials Centre, University of Sydney, Sydney, Australia
    J Clin Oncol 27:5640-9. 2009
    ..This article is a review and meta-analysis of studies reporting contralateral MRI in women with newly diagnosed invasive breast cancer...
  9. pmc The value of age and medical history for predicting colorectal cancer and adenomas in people referred for colonoscopy
    Barbara Ann Adelstein
    Prince of Wales Clinical School, Faculty of Medicine, University of New South Wales, Sydney, Australia
    BMC Gastroenterol 11:97. 2011
    ..The aim of this study is to assess a model that identifies people with colorectal cancer, advanced, large and small adenomas...
  10. doi request reprint Ductal carcinoma in situ at core-needle biopsy: meta-analysis of underestimation and predictors of invasive breast cancer
    Meagan E Brennan
    Screening and Test Evaluation Program, School of Public Health, Sydney Medical School, University of Sydney, Edward Ford Building, Room A27, Sydney, NSW 2006, Australia
    Radiology 260:119-28. 2011
    ....
  11. doi request reprint Determining the impact of informed choice: separating treatment effects from the effects of choice and selection in randomized trials
    Kirsten J McCaffery
    Screening and Test Evaluation Program, School of Public Health, University of Sydney, Sydney, Australia
    Med Decis Making 31:229-36. 2011
    ..The Rucker 2-stage randomized trial (RCT) design and method allows treatment, preference, and selection effects to be estimated separately in clinical trials...
  12. ncbi request reprint Cervical cytology reading times: a comparison between ThinPrep Imager and conventional methods
    Elizabeth Davey
    Screening and Test Evaluation Program, School of Public Health, University of Sydney, Sydney, Australia
    Diagn Cytopathol 35:550-4. 2007
    ..The TPI significantly reduced reading times compared with CC. This reduction was greater amongst slower readers, and was unrelated to experience...
  13. pmc Psychosocial outcomes of three triage methods for the management of borderline abnormal cervical smears: an open randomised trial
    Kirsten J McCaffery
    Screening and Test Evaluation Program, School of Public Health, University of Sydney, NSW 2006, Australia
    BMJ 340:b4491. 2010
    ..To assess which of three triage strategies for women with borderline abnormal cervical smear results in the best psychosocial outcomes...
  14. pmc Meta-analysis: retinal vessel caliber and risk for coronary heart disease
    Kevin McGeechan
    School of Public Health, University of Sydney, Sydney, New South Wales, Australia
    Ann Intern Med 151:404-13. 2009
    ..Retinal vessel caliber may be a novel marker of coronary heart disease (CHD) risk. However, the sex-specific effect, magnitude of association, and effect independent of traditional CHD disease risk factors remain unclear...
  15. pmc Patients who take their symptoms less seriously are more likely to have colorectal cancer
    Barbara Ann Adelstein
    Prince of Wales Clinical School, Faculty of Medicine, University of New South Wales, Sydney, Australia
    BMC Gastroenterol 12:130. 2012
    ..To do this we assessed whether the likelihood of detecting colorectal cancer is higher in patients who report that they take symptoms less seriously than other people do...
  16. ncbi request reprint The performance of tests of publication bias and other sample size effects in systematic reviews of diagnostic test accuracy was assessed
    Jonathan J Deeks
    Screening and Test Evaluation Program, School of Public Health, University of Sydney, Sydney, New South Wales 2006, Australia
    J Clin Epidemiol 58:882-93. 2005
    ..We investigate limitations of standard funnel plots and tests when applied to meta-analyses of test accuracy and look for improved methods...
  17. doi request reprint HPV testing versus repeat Pap testing for the management of a minor abnormal Pap smear: evaluation of a decision aid to support informed choice
    Kirsten J McCaffery
    Screening and Test Evaluation Program, School of Public Health, University of Sydney, NSW 2006, Australia
    Patient Educ Couns 73:473-9, 481. 2008
    ..To examine women's informed preference for the management of a mildly abnormal Pap smear and the impact of a decision aid...
  18. pmc Most bowel cancer symptoms do not indicate colorectal cancer and polyps: a systematic review
    Barbara Ann Adelstein
    Prince of Wales Clinical School, Faculty of Medicine, University of NSW, Sydney, Australia
    BMC Gastroenterol 11:65. 2011
    ..However, the evidence for this practice is unclear. The objective of this study is to systematically review the evidence about the association between bowel symptoms and colorectal cancer or polyps...
  19. doi request reprint Appropriate statistical methods are required to assess diagnostic tests for replacement, add-on, and triage
    Andrew Hayen
    Screening and Test Evaluation Program, Sydney School of Public Health, University of Sydney, Sydney, New South Wales, Australia
    J Clin Epidemiol 63:883-91. 2010
    ..To explain which measures of accuracy and which statistical methods should be used in studies to assess the value of a new binary test as a replacement test, an add-on test, or a triage test...
  20. doi request reprint Should response rules be used to decide continued subsidy of very expensive drugs? A checklist for decision makers
    Katy J L Bell
    Screening and Test Evaluation Program, School of Public Health, The University of Sydney, Edward Ford Building A27, NSW 2006, Australia
    Pharmacoepidemiol Drug Saf 19:99-105. 2010
    ..Careful assessment is needed before decision makers adopt a response rule as a way of increasing the cost effectiveness of therapy...
  21. doi request reprint Absolute and relative accuracy of rapid urine tests for urinary tract infection in children: a meta-analysis
    Gabrielle J Williams
    Centre for Kidney Research, The Children s Hospital at Westmead, Sydney, Australia
    Lancet Infect Dis 10:240-50. 2010
    ..Rapid tests are negative in around 10% of children with a urinary tract infection and cannot replace urine culture. If resources allow, microscopy with Gram stain should be the single rapid test used...
  22. doi request reprint Accuracy and surgical impact of magnetic resonance imaging in breast cancer staging: systematic review and meta-analysis in detection of multifocal and multicentric cancer
    Nehmat Houssami
    Screening and Test Evaluation Program, School of Public Health, University of Sydney, Sydney, Australia
    J Clin Oncol 26:3248-58. 2008
    ..Randomized trials are needed to determine the clinical value of detecting additional disease which changes surgical treatment in women with apparently localized breast cancer...
  23. doi request reprint Monitoring initial response to Angiotensin-converting enzyme inhibitor-based regimens: an individual patient data meta-analysis from randomized, placebo-controlled trials
    Katy J L Bell
    Screening and Test Evaluation Program, School of Public Health, Edward Ford Building A27, University of Sydney, NSW 2006, Australia
    Hypertension 56:533-9. 2010
    ..Instead of monitoring an individual's blood pressure response, a better approach may be to simply assume the mean treatment effect...
  24. ncbi request reprint Does providing previous results change the accuracy of cervical cytology?
    Elizabeth Davey
    Screening and Test Evaluation Program, School of Public Health, University of Sydney, Sydney, New South Wales, Australia
    Acta Cytol 53:644-52. 2009
    ..To determine whether providing previous cytology and histology findings alters the accuracy of conventional cervical cytology reading or changes reading times...
  25. doi request reprint Preoperative ultrasound-guided needle biopsy of axillary nodes in invasive breast cancer: meta-analysis of its accuracy and utility in staging the axilla
    Nehmat Houssami
    Screening and Test Evaluation Program, School of Public Health, Sydney Medical School, University of Sydney, Sydney, Australia
    Ann Surg 254:243-51. 2011
    ..Systematic evidence synthesis of ultrasound-guided needle biopsy (UNB) of axillary nodes in breast cancer...
  26. doi request reprint Meta-analysis of the association of breast cancer subtype and pathologic complete response to neoadjuvant chemotherapy
    Nehmat Houssami
    Screening and Test Evaluation Program, School of Public Health, Sydney Medical School, University of Sydney, Sydney, Australia
    Eur J Cancer 48:3342-54. 2012
    ..We aimed to report summary estimates of the proportion of subjects achieving pCR (pCR%) by tumour subtype, and to determine whether subtype was independently associated with pCR, in a study-level meta-analysis...
  27. pmc The accuracy of clinical symptoms and signs for the diagnosis of serious bacterial infection in young febrile children: prospective cohort study of 15 781 febrile illnesses
    Jonathan C Craig
    Screening and Test Evaluation Program, School of Public Health, University of Sydney, Sydney, Australia
    BMJ 340:c1594. 2010
    ..Design Two year prospective cohort study. Setting The emergency department of The Children's Hospital at Westmead, Westmead, Australia...
  28. ncbi request reprint A randomized crossover trial of PAPNET for primary cervical screening
    Les Irwig
    Screening and Test Evaluation Program, School of Public Health, University of Sydney, Edward Ford Building A27, NSW 2006, Sydney, Australia
    J Clin Epidemiol 57:75-81. 2004
    ..To develop and demonstrate efficient methods to estimate the relative true positive and false positive rates of two cervical screening tests (conventional cytology and PAPNET)...
  29. doi request reprint Meta-analysis of the impact of surgical margins on local recurrence in women with early-stage invasive breast cancer treated with breast-conserving therapy
    Nehmat Houssami
    School of Public Health, Sydney Medical School, University of Sydney, Sydney, Australia
    Eur J Cancer 46:3219-32. 2010
    ..There is no consensus on what constitutes adequate negative margins in breast-conserving therapy (BCT). We review the evidence on surgical margins in BCT for early-stage invasive breast cancer...
  30. ncbi request reprint New methods give better estimates of changes in diagnostic accuracy when prior information is provided
    Les Irwig
    Screening and Test Evaluation Program, School of Public Health, Building A 27, University of Sydney, New South Wales 2006, Australia
    J Clin Epidemiol 59:299-307. 2006
    ..We propose comparing the combined accuracy of prior information and a test read (i) with or (ii) without knowledge of prior information. Analysis methods include simple decision rules and logistic regression...
  31. doi request reprint Mixed models showed no need for initial response monitoring after starting antihypertensive therapy
    Katy J L Bell
    School of Public Health, The University of Sydney, New South Wales, Australia
    J Clin Epidemiol 62:650-9. 2009
    ..To demonstrate how mixed models may be used to estimate treatment effects, and inform decisions on the need for monitoring initial response...
  32. doi request reprint Accuracy of a preoperative model for predicting invasive breast cancer in women with ductal carcinoma-in-situ on vacuum-assisted core needle biopsy
    Nehmat Houssami
    University of Sydney, Sydney, NSW, Australia
    Ann Surg Oncol 18:1364-71. 2011
    ..Core needle biopsy (CNB) diagnoses of ductal carcinoma-in-situ (DCIS) may represent understaged invasive breast cancer (IBC). We aimed to develop a model that helps identify preoperatively women with IBC after a CNB diagnosis of DCIS...
  33. pmc Value of routine monitoring of bone mineral density after starting bisphosphonate treatment: secondary analysis of trial data
    Katy J L Bell
    Screening and Test Evaluation Program, School of Public Health, Edward Ford Building A27, University of Sydney, NSW 2006, Australia
    BMJ 338:b2266. 2009
    ..To assess the value of monitoring response to bisphosphonate treatment by means of measuring bone mineral density...
  34. doi request reprint HER2 discordance between primary breast cancer and its paired metastasis: tumor biology or test artefact? Insights through meta-analysis
    Nehmat Houssami
    Screening and Test Evaluation Program, School of Public Health A27, Sydney Medical School, University of Sydney, Sydney 2006, Australia
    Breast Cancer Res Treat 129:659-74. 2011
    ..Test-related factors did not account for differences across studies in the HER2 discordant proportion...
  35. doi request reprint Control charts demonstrated limited utility for the monitoring of lung function in asthma
    Robin M Turner
    Screening and Test Evaluation Program, Sydney School of Public Health, University of Sydney, Edward Ford Building A27, Camperdown, NSW 2006, Australia
    J Clin Epidemiol 65:53-61. 2012
    ..Statistical process control charts have been advocated for use in monitoring of lung function in asthma. We aimed to evaluate their application in asthma using existing data from a randomized trial...
  36. doi request reprint The development of a quality appraisal tool for studies of diagnostic reliability (QAREL)
    Nicholas P Lucas
    School of Biomedical and Health Sciences, University of Western Sydney, Narellan Road, Campbelltown, Sydney, Australia
    J Clin Epidemiol 63:854-61. 2010
    ..In systematic reviews of the reliability of diagnostic tests, no quality assessment tool has been used consistently. The aim of this study was to develop a specific quality appraisal tool for studies of diagnostic reliability...
  37. ncbi request reprint Adjustment for baseline measurement error in randomized controlled trials induces bias
    Siew F Chan
    Screening and Test Evaluation Program STEP, School of Public Health, The University of Sydney, Edward Ford Building, A27, Sydney, NSW 2006, Australia
    Control Clin Trials 25:408-16. 2004
    ..It is underestimated when the control group has a smaller baseline mean...
  38. pmc Use of randomised trials to decide when to monitor response to new treatment
    Katy J L Bell
    Screening and Test Evaluation Program, School of Public Health, Edward Ford Building A27, The University of Sydney, NSW 2006, Australia
    BMJ 336:361-5. 2008
  39. ncbi request reprint Three methods to construct predictive models using logistic regression and likelihood ratios to facilitate adjustment for pretest probability give similar results
    Siew Foong Chan
    Screening and Test Evaluation Program, School of Public Health, University of Sydney, NSW 2006, Australia
    J Clin Epidemiol 61:52-63. 2008
    ..To compare three predictive models based on logistic regression to estimate adjusted likelihood ratios allowing for interdependency between diagnostic variables (tests)...
  40. ncbi request reprint Effect of study design and quality on unsatisfactory rates, cytology classifications, and accuracy in liquid-based versus conventional cervical cytology: a systematic review
    Elizabeth Davey
    Screening and Test Evaluation Program, School of Public Health, University of Sydney, Australia
    Lancet 367:122-32. 2006
    ..We reviewed the published work to assess the performance of liquid-based cytology relative to conventional cytology in primary studies assessed to be of low, medium, or high methodological quality...
  41. doi request reprint Red flags to screen for vertebral fracture in patients presenting with low-back pain
    Christopher M Williams
    The George Institute for GlobalHealth, University of Sydney, Sydney, Australia
    Cochrane Database Syst Rev 1:CD008643. 2013
    ..All 'evidence-based' clinical practice guidelines recommend the use of red flags to screen for serious causes of back pain. However, it remains unclear if the diagnostic accuracy of red flags is sufficient to support this recommendation...
  42. ncbi request reprint Combining carbohydrate-deficient transferrin and gamma-glutamyltransferase to increase diagnostic accuracy for problem drinking
    Jack Chen
    School of Public Health, University of Sydney, Sydney, New South Wales, Australia
    Alcohol Alcohol 38:574-82. 2003
    ..To examine methods for combining quantitative results for serum carbohydrate deficient transferrin (CDT), gamma-glutamyltransferase (GGT) and/or aspartate aminotransferase (AST), and refining these by inclusion of patient characteristics...
  43. pmc A self administered reliable questionnaire to assess lower bowel symptoms
    Barbara Ann Adelstein
    Screening and Test Evaluation Program STEP, School of Public Health, University of Sydney, Australia
    BMC Gastroenterol 8:8. 2008
    ..Our aim was to develop a self administered questionnaire for eliciting the presence, nature and severity of lower bowel symptoms potentially related to colorectal cancer, and assess its reliability...
  44. pmc Risk prediction of coronary heart disease based on retinal vascular caliber (from the Atherosclerosis Risk In Communities [ARIC] Study)
    Kevin McGeechan
    School of Public Health, University of Sydney, Sydney, Australia
    Am J Cardiol 102:58-63. 2008
    ..In conclusion, although retinal vascular caliber independently predicted CHD risk in women, the incremental predictive ability over that of the Framingham model was modest and unlikely to translate meaningfully into clinical practice...
  45. ncbi request reprint Ordering of renal tract imaging by paediatricians after urinary tract infection
    Gabrielle Williams
    Centre for Kidney Research, The Children s Hospital at Westmead, Westmead, and Screening and Test Evaluation Program, School of Public Health, University of Sydney, Sydney, New South Wales, Australia
    J Paediatr Child Health 43:271-9. 2007
    ..To describe paediatricians' reported ordering of renal tract imaging of children following urinary tract infection...
  46. ncbi request reprint Intraocular lens power in bilateral cataract surgery: whether adjusting for error of predicted refraction in the first eye improves prediction in the second eye
    James Jabbour
    University of New South Wales at the Prince of Wales Hospital and the School of Public Health, University of Sydney, Sydney, Australia
    J Cataract Refract Surg 32:2091-7. 2006
    ..To assess whether the retrospectively calculated intraocular lens (IOL) position value in the first eye reduces the error of predicted refraction in the second...
  47. ncbi request reprint Re: In response to the correspondence arising from Twisk and Proper: evaluation of the results of a randomized controlled trial: how to define changes between baseline and follow-up
    Siew F Chan
    J Clin Epidemiol 59:323; author reply 323-4. 2006
  48. ncbi request reprint Epidemiology of physical activity participation among New South Wales school students
    Michael L Booth
    Department of Paediatrics and Child Health, University of Sydney, Children s Hospital at Westmead, New South Wales
    Aust N Z J Public Health 26:371-4. 2002
    ..To examine the prevalence and socio-demographic distribution of physical activity among New South Wales school students in Years 8 and 10...