Are there researcher allegiance effects in diagnostic validation studies of the PHQ-9? A systematic review and meta-analysis.

ABSTRACT:

Objectives

To investigate whether an authorship effect is found that leads to better performance in studies conducted by the original developers of the Patient Health Questionnaire (PHQ-9) (allegiant studies).

Design

Systematic review with random effects bivariate diagnostic meta-analysis. Search strategies included electronic databases, examination of reference lists and forward citation searches.

Inclusion criteria

Included studies provided sufficient data to calculate the diagnostic accuracy of the PHQ-9 against a gold standard diagnosis of major depression using the algorithm or the summed item scoring method at cut-off point 10.

Data extraction

Descriptive information, methodological quality criteria and 2×2 contingency tables.

Results

Seven allegia

SUBMITTER: Manea L 

PROVIDER: S-EPMC5640143 | biostudies-literature | 2017 Sep

REPOSITORIES: biostudies-literature