Comparison of different scoring methods

Fischer F, Levis B, Falk C, Sun Y, Ioannidis JPA, Cuijpers P, Shrier I, Benedetti A, Thombs BD, and the DEPRESsion Screening Data (DEPRESSD). (2021). PHQ Collaboration. Comparison of different scoring methods based on latent variable models of the PHQ-9: an individual participant data meta-analysis. Psychological Medicine.