Peer-Reviewed Poster Conference Presentations

He C, Levis B, Thombs BD, Benedetti A, and the DEPRESSD Research Group. The diagnostic accuracy of the Patient Health Questionaire-9 (PHQ-9) algorithm for detecting major depression: An individual participant data meta-analysis. Tenth Annual Lady Davis Institute for Medical Research Scientific Retreat. Montreal, Quebec, Canada. May 2019. 

Wu Y, Levis B, Thombs BD, Benedetti A, and the DEPRESsion Screening Data (DEPRESSD) Collaboration. Evaluation of the equivalency of the PHQ-8 and PHQ-9: A systematic review and individual participant data meta-analysis. Tenth Annual Lady Davis Institute for Medical Research Scientific Retreat. Montreal, Quebec, Canada. May 2019. 

Levis B, McMillan D, Sun S, Benedetti A, Thombs BD, and the DEPRESsion Screening Data (DEPRESSD) Collaboration. A comparison of major depression classification rates using different diagnostic interviews among women in pregnancy or postpartum: an individual participant data meta-analysis. Tenth Annual Lady Davis Institute for Medical Research Scientific Retreat. Montreal, Quebec, Canada. May 2019. 

He C, Levis B, Thombs BD, Benedetti A, and the DEPRESSD Research Group. The diagnostic accuracy of the Patient Health Questionaire-9 (PHQ-9) algorithm for detecting major depression: An individual participant data meta-analysis. McGill Epidemiology, Biostatistics and Occupational Health 12th Annual Student Research Day. Montreal, Quebec, Canada. March 2019. 

Levis B, Benedetti A, Riehm KE, Saadat N, Levis AW, Azar M, Rice DB, Chiovitti MJ, Sanchez TA, Thombs BD, and the DEPRESSD Research Group. Diagnostic accuracy of the PHQ-9 depression screening tool compared to semi-structured versus fully structured diagnostic interviews: an individual participant data meta-analysis comparing reference standards. Methods for Evaluating Medical Tests and Biomarkers (MEMTAB) Conference. Utrecht, Netherlands. July 2018. 

Levis B, Benedetti A, Riehm KE, Saadat N, Levis AW, Azar M, Rice DB, Chiovitti MJ, Sanchez TA, Thombs BD, and the DEPRESSD Research Group. Are semi-structured and fully structured diagnostic interviews equivalent reference standards for major depression? An individual participant data meta-analysis comparing diagnoses across diagnostic interviews. Methods for Evaluating Medical Tests and Biomarkers (MEMTAB) Conference. Utrecht, Netherlands. July 2018. 

Levis B, Benedetti A, Riehm KE, Saadat N, Levis AW, Azar M, Rice DB, Chiovitti MJ, Sanchez TA, Thombs BD, and the DEPRESSD Research Group. Are semi-structured and fully structured diagnostic interviews equivalent reference standards for major depression? An individual participant data meta-analysis comparing diagnoses across diagnostic interviews. Methods for Evaluating Medical Tests and Biomarkers (MEMTAB) Conference. Utrecht, Netherlands. July 2018. 

Levis B, Benedetti A, Riehm KE, Saadat N, Levis AW, Azar M, Rice DB, Thombs BD, and the DEPRESSD Research Group. Underestimation of depression screening tool sensitivity when using lay-administered fully structured diagnostic interviews as the reference standard. Global Evidence Summit (GES). Cape Town, South Africa. September 2017. 

Levis B, Benedetti A, Riehm KE, Saadat N, Levis AW, Azar M, Rice DB, Thombs BD, and the DEPRESSD Research Group. An individual patient data (IPD) meta-analysis on the diagnostic test accuracy of the Patient Health Questionnaire-9 (PHQ-9) depression screening tool. Society for Epidemiologic Research (SER) 50th Annual Meeting. Seattle, Washington, USA. June 2017. 

Levis B, Benedetti A, Riehm KE, Saadat N, Levis AW, Azar M, Rice DB, Chiovitti M, Thombs BD, and the DEPRESSD Research Group. Diagnostic interviews for major depression: A comparison of diagnoses made using semi-structured vs. fully-structured administration methods. Society for Epidemiologic Research (SER) 50th Annual Meeting. Seattle, Washington, USA. June 2017. 

Levis B, Benedetti A, Riehm KE, Saadat N, Levis AW, Azar M, Rice DB, Thombs BD, and theDEPRESSD Research Group. An individual patient data (IPD) meta-analysis on the diagnostic test accuracy of the Patient Health Questionnaire-9 (PHQ-9) depression screening tool. Eighth Annual Lady Davis Institute for Medical Research Scientific Retreat. Montreal, Quebec, Canada. May 2017.  

Levis B, Benedetti A, Levis AW, Ioannidis JPA, Shrier I, Cuijpers P, Gilbody S, Kloda LA, McMillan D, Patten SB, Steele RJ, Ziegelstein RC, Bombardier CH, de Lima Osório F, Fann JR, Gjerdingen D, Lamers F, Lotrakul M, Loureiro SR, Löwe B, Shaaban J, Stafford L, van Weert HCPM, Whooley MA, Williams LS, Wittkampf KA, Yeung AS, Thombs BD. Selective cutoff reporting in studies of diagnostic test accuracy: a comparison of conventional and individual patient data meta-analyses of the Patient Health Questionnaire-9 depression screening tool. 2016 Methods for Evaluating Medical Tests and Biomarkers (MEMTAB) Symposium, Birmingham, United Kingdom. July 2016. 

Levis B, Benedetti A, Levis AW, Thombs BD. Selective cutoff reporting in studies of diagnostic test accuracy: a comparison of conventional and individual patient data meta-analyses of the Patient Health Questionnaire-9 depression screening tool. Seventh Annual Lady Davis Institute for Medical Research Scientific Retreat. Montreal, Quebec, Canada. June 2016. 

Levis B, Benedetti A, Levis AW, Thombs BD. Selective cutoff reporting in studies of diagnostic accuracy of depression screening tools. American Psychological Association (APA) Annual Convention. Toronto, Ontario, Canada. August 2015. 

Levis B, Benedetti A, Levis AW, Thombs BD. Selective cutoff reporting in studies of diagnostic test accuracy of depression screening tools: Comparing traditional meta-analysis to individual patient data meta-analysis. Society for Epidemiologic Research (SER) 48th Annual Meeting. Denver, Colorado, USA. June 2015. 

Levis B, Benedetti A, Levis AW, Thombs BD. Selective reporting in studies of diagnostic test accuracy: Comparing traditional meta-analysis to individual patient data meta-analysis to assess the diagnostic accuracy of the Patient Health Questionnaire-9. 76th Canadian Psychological Association Annual Convention. Ottawa, Ontario, Canada. June 2015. 

Simoneau G, Levis B, Thombs BD, Benedetti A. An empirical comparison of methods to meta-analyze individual patient data of diagnostic accuracy. Statistical Society of Canada (SSC) Annual Conference, Halifax, Nova Scotia, Canada. June 2015. 

Simoneau G, Levis B, Thombs BD, Benedetti A. An empirical comparison of methods to meta-analyze individual patient data of diagnostic accuracy. Canadian Society of Epidemiology and Biostatistics (CSEB) Annual Conference. Toronto, Ontario, Canada. May 2015. 

Levis B, Benedetti A, Thombs BD. Comparison of a traditional meta-analysis versus an individual patient data (IPD) meta-analysis to assess the diagnostic accuracy of the Patient Health Questionnaire-9 (PHQ-9). Fifth Annual Lady Davis Institute for Medical Research Scientific Retreat. Montreal, Quebec, Canada. May 2014. 

Levis B, Thombs BD. The DEPRESsion Screening Data (DEPRESSD) Registry: A protocol for a registry to support individual patient data meta-analyses of the diagnostic accuracy of depression screening tools. 2013 Cochrane Colloquium. Quebec City, Quebec, Canada. September 2013. 

Levis B, Thombs BD. The DEPRESsion Screening Data (DEPRESSD) Registry: A protocol for a registry to support individual patient data meta-analyses of the diagnostic accuracy of depression screening tools. 2013 Cochrane Colloquium. Quebec City, Quebec, Canada. September 2013. 

©2020 by DEPRESSD. ALL RIGHTS RESERVED