Depression

DEPRESSD

An international collaborative to assess the diagnostic accuracy of key depression scales

External validation of a shortened screening tool using individual participant data meta-analysis: A case study of the Patient Health Questionnaire-Dep-4

Shortened versions of self-reported questionnaires may be used to reduce respondent burden. When shortened screening tools are used, it is desirable to maintain equivalent diagnostic accuracy to full-length forms. This manuscript presents a case …

PHQ-8 scores and estimation of depression prevalence

In the Article by Jorge Arias-de la Torre and colleagues the authors used data for 258,888 individuals obtained from the second wave of the European Health Interview Survey to estimate depression prevalence in 27 European countries based on scores of …

New publication: Latent variable scoring of the PHQ-9

In 2019 I stayed at McGill University in Montreal over the summer at Brett Thombs' Research Group and in particular the DEPRESSD project - a large scale initiative to gather as much raw data as possible from diagnostic studies of some of the most popular depression screening tools.

Comparison of different scoring methods based on latent variable models of the PHQ-9: an individual participant data meta-analysis

**Background:** Previous research on the depression scale of the Patient Health Questionnaire (PHQ-9) has found that different latent factor models have maximized empirical measures of goodness-of-fit. The clinical relevance of these differences is …

Accuracy of the PHQ-2 Alone and in Combination with the PHQ-9 for Screening to Detect Major Depression: Systematic Review and Meta-analysis

**Importance:** The Patient Health Questionnaire depression module (PHQ-9) is a 9-item self-administered instrument used for detecting depression and assessing severity of depression. The Patient Health Questionnaire-2 (PHQ-2) consists of the first 2 …

Equivalency of the diagnostic accuracy of the PHQ-8 and PHQ-9: a systematic review and individual participant data meta-analysis

**Background:** Item 9 of the Patient Health Questionnaire-9 (PHQ-9) queries about thoughts of death and self-harm, but not suicidality. Although it is sometimes used to assess suicide risk, most positive responses are not associated with …

Patient Health Questionnaire-9 scores do not accurately estimate depression prevalence: individual participant data meta-analysis

**Objectives:** Depression symptom questionnaires are not for diagnostic classification. Patient Health Questionnaire-9 (PHQ-9) scores ≥10 are nonetheless often used to estimate depression prevalence. We compared PHQ-9 ≥10 prevalence to Structured …

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

The Accuracy of the Patient Health Questionnaire-9 (PHQ-9) Algorithm for Screening to Detect Major Depression: An Individual Participant Data Meta-analysis

**Background:** Screening for major depression with the Patient Health Questionnaire-9 (PHQ-9) can be done using a cutoff or the PHQ-9 diagnostic algorithm. Many primary studies publish results for only one approach, and previous meta-analyses of the …