Study Protocols Published on Open Science Framework 

Brehaut E, Neupane D, Levis B, Wu Y, Ioannidis JPA, Benedetti A, Thombs BD, and the and the DEPRESsion Screening Data (DEPRESSD) Collaboration. Optimal cutoff selection in depression screening studies using the PHQ-9, EPDS, and HADS. Open Science Framework. September 15, 2020. https://osf.io/fxhyw/

Neupane D, Bhandari PM, Levis B, Shrier I, Ioannidis JPA, Markham S, Thombs BD, Benedetti A, and the DEPRESsion Screening Data (DEPRESSD) Collaboration. Evaluation of direct and indirect methods for comparing the screening accuracy of the PHQ-9 and HADS-D: protocol for an individual participant data meta-analysis. Open Science Framework. June 8, 2020. https://osf.io/75v6u/

Bhandari PM, Levis B, Negeri Z, Wu Y, Ioannidis JPA, Shrier I, Cuijpers P, Thombs BD, Benedetti A, and the DEPRESsion Screening Data (DEPRESSD) EPDS Collaboration. Estimating confidence intervals for the Youden’s J optimal cutoff and correcting for optimism in associated accuracy estimates: Protocol for an analysis using individual participant data of the Edinburgh Postnatal Depression Scale. Open Science Framework. May 2, 2020. https://osf.io/5gqth/

Bhandari PM, Levis B, Negeri Z, Wu Y, Ioannidis JPA, Shrier I, Cuijpers P, Thombs BD, Benedetti A, and the DEPRESsion Screening Data (DEPRESSD) Collaboration. Estimating confidence intervals for the Youden’s J optimal cutoff and correcting for optimism in associated accuracy estimates: Protocol for an analysis using individual participant data of the Patient Health Questionnaire-9. Open Science Framework. February 12, 2020. https://osf.io/5gqth/

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. Open Science Framework. January 24, 2020. https://osf.io/n5a3e/

Harel D, Levis B, Ishihara M, Levis AW, Thombs, BD, Benedetti A, and the DEPRESsion Screening Data (DEPRESSD) EPDS Collaboration. A Protocol for Shortening the Edinburgh Postnatal Depression Scale (EPDS) using Optimal Test Assembly Methods. Open Science Framework. November 14, 2019. https://osf.io/3cepr/

Fischer F, Levis B, Falk C, Ioannidis J, Cuijpers P, Shrier I, Thombs B, Benedetti A, and the DEPRESsion Screening Data (DEPRESSD) PHQ Collaboration. Comparison of different scoring methods based on latent variable models of the PHQ-9: protocol for an individual participant data meta-analysis. Open Science Framework. September 12, 2019. https://osf.io/2tyc3/

Lyubenova A, Neupane D, Levis B, Wu Y, Benedetti A, Thombs BD and the DEPRESsion Screening Data (DEPRESSD) Collaboration.  Depression prevalence based on the EPDS compared to Structured Clinical Interview for DSM classification: protocol for an individual participant data meta-analysis. Open Science Framework. July 2, 2019. https://osf.io/yw9u8/ 

Levis B, Bhandari PM, Benedetti A, Thombs BD and the DEPRESsion Screening Data (DEPRESSD) Collaboration. Evaluation of bias in diagnostic accuracy estimates due to data-driven cutoff selection: protocol for a simulation study using individual participant data from 58 studies on the diagnostic accuracy of the Patient Health Questionnaire-9 (PHQ-9). Open Science Framework. March 28, 2019. https://osf.io/pg2yc/ 

Neupane D, Levis B, Bhandari PM, Benedetti A, Thombs BD and the DEPRESsion Screening Data (DEPRESSD) Collaboration. Selective cutoff reporting in studies of diagnostic test accuracy: protocol for a comparison of meta-analysis of published accuracy estimates versus meta-analysis of individual participant data of the Edinburgh Postnatal Depression Scale. Open Science Framework. March 11, 2019. https://osf.io/z5sjp/ 

Bhandari PM, Levis B, Neupane D, Benedetti A, Thombs BD and the DEPRESsion Screening Data (DEPRESSD) Collaboration. Evaluation of bias in diagnostic accuracy estimates due to data-driven cutoff selection: protocol for a simulation study using individual participant data from 50 studies on the diagnostic accuracy of the Edinburgh Postnatal Depression Scale (EPDS). Open Science Framework. February 23, 2019. https://osf.io/854zn/ 

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