1. Validation of the combined Patient Health Questionnaire Anxiety and Depression Scale among people with HIV in Vietnam
- Author
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Nguyen, Minh X, Zimmer, Catherine, Latkin, Carl A, Lancaster, Kathryn E, Dowdy, David W, Hutton, Heidi, Chander, Geetanjali, Frangakis, Constantine, Gaynes, Bradley N, Sripaipan, Teerada, Tran, Ha V, and Go, Vivian F
- Abstract
Background Our study aims to examine the factor structure, validity, and reliability of the combined scale Patient Health Questionnaire Anxiety and Depression Scale (PHQ-ADS) among people with HIV (PWH) in Vietnam.Methods Baseline data from an alcohol-reduction intervention trial among ART clients in Thai Nguyen, Vietnam were used for this analysis (n= 1547). A score ≥10 on the PHQ-9, GAD-7 and PHQ-ADS scale was considered having clinically meaningful depression, anxiety and distress symptoms. Factor structure of the combined PHQ-ADS scale was validated using confirmatory factor analysis, and three models were tested: a one-factor, a two-factor, and a bi-factor model. Reliability and construct validity were examined.Results The prevalence of clinically meaningful depression and anxiety symptoms was 7% and 2%, respectively, while 19% had distress symptoms. A bi-factor model had the best fit to the data (RMSEA = 0.048; CFI = 0.99; TLI = 0.98). The Omega index of the bi-factor model was 0.97. The scale showed good construct validity through negative associations between depression, anxiety, distress symptoms and quality of life.Conclusions Our study supports the use of a combined scale to measure general distress for PWH, which has good validity, reliability and is unidimensional enough to justify the use of a composite depression and anxiety score.
- Published
- 2023
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