Published Peer-reviewed Manuscripts 

Levis B, Negeri Z, Sun Y, Benedetti A, Thombs BD, for the DEPRESsion Screening Data (DEPRESSD) EPDS Collaboration. Accuracy of the Edinburgh Postnatal Depression Scale (EPDS) for screening to detect major depression: systematic review and meta-analysis of individual participant data. BMJ. In Press. 

Brehaut E, Neupane D, Levis B, Wu Y, Benedetti A, Thombs BD, and the DEPRESsion Screening Data (DEPRESSD) HADS Collaboration. Depression prevalence based on the HADS depression subscale compared to Structured Clinical Interview for DSM classification: individual participant data meta-analysis. J Psychosom Res. In Press.

Benedetti A, Levis B, Rücker G, Jones HE, Ioannidis JPA, Thombs BD, and the DEPRESSD Collaboration. An empirical comparison of three methods for multiple cut-off diagnostic test meta-analysis of the Patient Health Questionnaire-9 (PHQ-9) depression screening tool using published data versus individual level data. Research Synthesis Methods. In Press. 

Thombs BD, Levis B, Lyubenova A, Neupane D, Negeri Z, Wu Y, Sun Y, He C, Krishnan A, Vigod SN, Bhandari PM, Imran M, Rice DB, Azar M, Chiovitti MJ, Saadat N, Riehm KE, Boruff JT, Cuijpers P, Gilbody S, Ionnidis JPA, Kloda LA, Patten SB, Shrier I, Ziegelstein RC, Comeau L, Mitchell ND, Tonelli M, Barnes J, Tatano Beck C, Bindt C, Figueiredo B, Helle N, Howard L, Kohlhoff J, Kozinszky Z, Nakic Ramos S, Quispel C, Rochat TJ, Stewart RC, Tadinac M, Tandon SD, Tendais I, Toreki A, Tran TD, Trevillion K, Turner K, Vega-dienstmaier JM, Benedetti A. Overestimation of postpartum depression prevalence based on a 5-item version of the EPDS: systematic review and individual participant data meta-analysis. Can J Psychiatry. In Press

Wu Y, Levis B, Ioannidis J, Benedetti A, Thombs BD, on behalf of the DEPRESsion Screening Data (DEPRESSD) Collaboration. Probability of major depression based on the SCID, CIDI, and MINI diagnostic interviews: a synthesis of three individual participant data meta-analyses. Psychother Psychosom. Online ahead of print.

Levis B, Sun Y, He C, Wu Y, Krishnan A, Bhandari PM, Neupane D, Imran M, Brehaut E, Negeri Z, Fischer FH, Benedetti A, Thombs BD, for the DEPRESsion Screening Data (DEPRESSD) PHQ Collaboration. Accuracy of the PHQ-2 alone and in combination with the PHQ-9 for screening to detect major depression: an individual participant data meta-analysis. JAMA. 2020;323(22):2290-3000.

Levis B, Benedetti A, Ioannidis JPA, Sun Y, Negeri Z, He C, Wu Y, Krishnan A, Bhandari PM, Neupane D, Imran M, Rice DB, Riehm KE, Saadat N, Azar M, Boruff J, Cuijpers P, Gilbody S, Kloda LA, McMillan D, Patten SB, Shrier I, Ziegelstein RC, Alamri SH, Amtmann D, Ayalon L, Baradaran HR, Beraldi A, Bernstein CN, Bhana A, Bombardier CH, Carter G, Chagas MH, Chibanda D, Clover K, Conwell Y, Diez-Quevedo C, Fann JR, Fischer FH, Gholizadeh L, Gibson LJ, Green EP, Greeno CG, Hall BJ, Haroz EE, Ismail K, Jetté N, Khamseh ME, Kwan Y, Lara MA, Liu SI, Loureiro SR, Löwe B, Marrie RA, Marsh L, McGuire A, Muramatsu K, Navarrete L, Osório FL, Petersen I, Picardi A, Pugh SL, Quinn TJ, Rooney AG, Shinn EH, Sidebottom A, Spangenberg L, Tan PLL, Taylor-Rowan M, Turner A, van Weert HC, Vöhringer PA, Wagner LI, White J, Winkley K, Thombs BD. Patient Health Questionnaire-9 scores do not accurately estimate depression prevalence: individual participant data meta-analysis. J Clin Epidemiol. 2020 Jun;122:115-128.e1. 

McGrath S, Zhao XF, Steele R, Thombs BD, Benedetti A, and the DEPRESsion Screening Data (DEPRESSD) Collaboration. Estimating the sample mean and standard deviation from commonly reported quantiles in meta-analysis. Stat Methods Med Res. ePub ahead of print. 

Wu Y, Levis B, Sun Y, Krishnan A, He C, Riehm KE, Rice DB, Azar M, Yan XW, Neupane D, Bhandari PM. Probability of major depression diagnostic classification based on the SCID, CIDI and MINI diagnostic interviews controlling for Hospital Anxiety and Depression Scale–Depression subscale scores: An individual participant data meta-analysis of 73 primary studies. Journal of Psychosomatic Research. 2020 Feb 1;129:109892.

Levis B, McMillan D, Sun Y, He C, Rice DB, Krishnan A, et al. Comparison of major depression diagnostic classification probability using the SCID, CIDI and MINI diagnostic interviews among women in pregnancy of postpartum: An individual participant data meta-analysis. IJMPR. 2019 Sep 30:e1803

He C, Levis B, Riehm KE, Saadat N, Levis AW, Azar M, et al. The accuracy of the Patient Health Questionnaire-9 algorithm for screening to detect major depression: An individual participant data meta-analysis. Psychotherapy and Psychosomatics. 2019 Oct 8:1-13. 

Wu Y, Levis B, Riehm KE, Saadat N, Levis AW, Azar M, Rice DB, Boruff J, Cuijpers P, Gilbody S, Ioannidis JPA, Kloda LA, McMillan D, Patten SB, Shrier I, Ziegelstein RC, Akena DH, Arroll B, Ayalon L, Baradaran HR, Baron M, Bombardier CH, Butterworth P, Carter G, Chagas MH, Chan JCN, Cholera R, Conwell Y, de Man-van Ginkel JM, Fann JR, Fischer FH, Fung D, Gelaye B, Goodyear-Smith F, Greeno CG, Hall BJ, Harrison PA, Härter M, Hegerl U, Hides L, Hobfoll SE, Hudson M, Hyphantis T, Inagaki M, Jetté N, Khamseh ME, Kiely KM, Kwan Y, Lamers F, Liu S-I, Lotrakul M, Loureiro SR, Löwe B, McGuire A, Mohd-Sidik S, Munhoz TN, Muramatsu K, Osório FL, Patel V, Pence BW, Persoons P, Picardi A, Reuter K, Rooney AG, Santos IS, Shaaban J, Sidebottom A, Simning A, Stafford L, Sung S, Tan PLL, Turner A, van Weert HC, White J, Whooley MA, Winkley K, Yamada M, Benedetti A, Thombs BD. Equivalency of the diagnostic accuracy of the PHQ-8 and PHQ-9: a systematic review and individual participant data meta-analysis. Psychol Med. 2019 Jul 12:1-13. 

Levis B, Benedetti A, Thombs BD, and the DEPRESsion Screening Data (DEPRESSD) Collaboration (Riehm KE, Saadat N, Levis AW, Azar M, Rice DB, Chiovitti MJ, Sanchez TA, Boruff J, Cuijpers P, Gilbody S, Ioannidis JPA, Kloda LA, McMillan D, Patten SB, Shrier I, Ziegelstein RC, Akena DH, Arroll B, Ayalon L, Baradaran HR, Baron M, Bombardier CH, Butterworth P, Carter G, Chagas MH, Chan JCN, Clover K, Conwell Y, de Man-van Ginkel JM, Delgadillo J, Fann JR, Fischer FH, Fung D, Gelaye B, Goodyear-Smith F, Greeno CG, Hall BJ, Hambridge J, Harrison PA, Härter M, Hegerl U, Hides L, Hobfoll SE, Hudson M, Inagaki M, Ismail K, Jetté N, Khamseh ME, Kiely KM, Kwan Y, Liu SI, Lotrakul M, Loureiro SR, Löwe B, Marsh L, McGuire A, Mohd Sidik S, Munhoz TN, Muramatsu K, Osório FL, Patel V, Pence BW, Persoons P, Picardi A, Reuter K, Rooney AG, Santos IS, Shaaban J, Sidebottom A, Simning A, Stafford L, Sung SC, Tan PLL, Turner A, van der Feltz-Cornelis CM, van Weert HC, Vöhringer PA, White J, Whooley MA, Winkley K, Yamada M, and Zhang Y). Accuracy of Patient Health Questionnaire-9 (PHQ-9) for screening to detect major depression: individual participant data meta-analysis. BMJ. 2019;365:I1476. 

Benedetti A, Wu Y, Levis B, Wilchesky M, Boruff J, Ioannidis JPA, Patten SB, Cuijpers P, Shrier I, Gilbody S, Ismail Z, McMillan D, Mitchell N, Ziegelstein RC, Thombs BD. Diagnostic accuracy of the Geriatric Depression Scale-30, Geriatric Depression Scale-15, Geriatric Depression Scale-5, and Geriatric Depression Scale-4 for detecting major depression: Protocol for a systematic review and individual participant data meta-analysis. BMJ Open. 2018;8(12):e026598. 

Ishihara M, Harel D, Levis B, Levis AW, Riehm KE, Saadat N, Azar M, Rice DB, Sanchez TA, Chiovitti MJ, Cuijpers P, Gilbody S, Ioannidis JPA, Kloda LA, McMillan D, Patten SB, Shrier I, Arroll B, Bombardier CH, Butterworth P, Carter G, Clover K, Conwell Y, Goodyear-Smith F, Greeno CG, Hambridge J, Harrison PA, Hudson M, Jetté N, Kiely KM, McGuire A, Pence BW, Rooney AG, Sidebottom A, Simning A, Turner A, White J, Whooley MA, Winkley K, Benedetti A, Thombs BD. Shortening self-report mental health symptom measures through optimal test assembly Methods: Development and validation of the Patient Health Questionnaire-Depression-4. Depression and Anxiety. 2019;36(1):82-92. 

Levis B, Benedetti A, Riehm KE, Saadat N, Levis AW, Azar M, Rice DB, Chiovitti MJ, Sanchez TA, Cuijpers P, Gilbody S, Ioannidis JPA, Kloda LA, McMillan D, Patten SB, Shrier I, Steele RJ, Ziegelstein RC, Akena DH, Arroll B, Ayalon L, Baradaran HR, Baron M, Beraldi A, Bombardier CH, Butterworth P, Carter G, Chagas MH, Chan JCN, Cholera R, Chowdhary N, Clover K, Conwell Y, de Man-van Ginkel JM, Delgadillo J, Fann JR, Fischer FH, Fischler B, Fung D, Gelaye B, Goodyear-Smith F, Greeno CG, Hall BJ, Hambridge J, Harrison PA, Hegerl U, Hides L, Hobfoll SE, Hudson M, Hyphantis T, Inagaki M, Ismail K, Jetté N, Khamseh ME, Kiely KM, Lamers F, Liu SI, Lotrakul M, Loureiro SR, Löwe B, Marsh L, McGuire A, Mohd Sidik S, Munhoz TN, Muramatsu K, Osório FL, Patel V, Pence BW, Persoons P, Picardi A, Rooney AG, Santos IS, Shaaban J, Sidebottom A, Simning A, Stafford L, Sung S, Tan PLL, Turner A, van der Feltz-Cornelis CM, van Weert HC, Vöhringer PA, White J, Whooley MA, Winkley K, Yamada M, Zhang Y, Thombs BD. Probability of major depression diagnostic classification using semi-structured versus fully structured diagnostic interviews. British Journal of Psychiatry. 2018;212:377-385. 

Simoneau G, Levis B, Cuijpers P, Ioannidis JPA, Patten SB, Shrier I, Bombardier CH, de Lima Osório F, Fann JR, Gjerdingen D, Lamers F, Lotrakul M, Löwe B, Shaaban J, Stafford L, van Weert HCPM, Whooley MA, Wittkampf KA, Yeung AS, Thombs BD, Benedetti A. A comparison of bivariate, multivariate random-effects, and Poisson correlated gamma-frailty models to meta-analyze individual patient data of ordinal scale diagnostic tests. Biometrical Journal. 2017;59:1317-1338. 

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 traditional and individual patient data meta-analyses of the Patient Health Questionnaire-9 depression screening tool. American Journal of Epidemiology. 2017;185(10):954-964

Thombs BD, Benedetti A, Kloda LA, Levis B, Azar M, Riehm KE, Saadat N, Cuijpers P, Gilbody S, Ioannidis JP, McMillan D, Patten SB, Shrier I, Steele RJ, Ziegelstein RC, Loiselle CG, Henry M, Ismail Z, Mitchell N, Tonelli M. Diagnostic accuracy of the Depression subscale of the Hospital Anxiety and Depression Scale (HADS-D) for detecting major depression: protocol for a systematic review and individual patient data meta-analyses. BMJ Open. 2016 Apr 13;6:e011913.  

Thombs BD, Benedetti A, Kloda LA, Levis B, Riehm KE, Azar M, Cuijpers P, Gilbody S, Ioannidis JP, McMillan D, Patten SB, Shrier I, Steele RJ, Ziegelstein RC, Tonelli M, Mitchell N, Comeau L, Schinazi J, Vigod S. Diagnostic accuracy of the Edinburgh Postnatal Depression Scale (EPDS) for detecting major depression in pregnant and postnatal women: protocol for a systematic review and individual patient data meta-analyses. BMJ Open. 2015 Oct;5:e009742. 

Thombs BD, Benedetti A, Kloda LA, Levis B, Nicolau I, Cuijpers P, Gilbody S, Ioannidis JP, McMillan D, Patten SB, Shrier I, Steele RJ, Ziegelstein RC. The diagnostic accuracy of the Patient Health Questionnaire-2 (PHQ-2), Patient Health Questionnaire-8 (PHQ-8), and Patient Health Questionnaire-9 (PHQ-9) for detecting major depression: protocol for a systematic review and individual patient data meta-analyses. Systematic Reviews. 2014 Oct;3:124.  

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