1. Validation of screening instruments for common mental disorders and suicide risk in south African primary care settings.
- Author
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Stockton MA, Mazinyo EW, Mlanjeni L, Sweetland AC, Scharf JY, Nogemane K, Ngcelwane N, Basaraba C, Bezuidenhout C, Sansbury G, Olivier D, Grobler C, Wall MM, Medina-Marino A, Nobatyi P, and Wainberg ML
- Subjects
- Humans, South Africa epidemiology, Female, Adult, Male, Middle Aged, Reproducibility of Results, Mass Screening, Suicide psychology, Suicide statistics & numerical data, Psychiatric Status Rating Scales standards, Mental Disorders diagnosis, Mental Disorders epidemiology, Stress Disorders, Post-Traumatic diagnosis, Stress Disorders, Post-Traumatic epidemiology, Patient Health Questionnaire, Young Adult, Psychometrics, Risk Assessment, Prevalence, Surveys and Questionnaires standards, Adolescent, Primary Health Care, Sensitivity and Specificity, Anxiety Disorders diagnosis, Anxiety Disorders epidemiology
- Abstract
Introduction: In South Africa, there is limited mental health infrastructure and resources. Valid screening tools are needed to facilitate identification and linkage to care. We evaluated the performance of Patient Health Questionnaire-9 (PHQ-9), Generalized Anxiety Disorder-7 (GAD-7), Primary Care Post Traumatic Stress Disorder Screen for DSM-5 (PC-PTSD-5), and the Columbia Suicide Severity Rating Scale (C-SSRS) among adults in South Africa against a diagnostic gold standard., Methods: Adults present at healthcare facilities were screened with the PHQ-9, GAD-7, PC-PTSD-5, and the C-SSRS. Nurses used a structured diagnostic interview to identify depression, anxiety, panic disorder, PTSD and elevated suicide risk. We assessed the internal consistency, criterion validity, and the sensitivity and specificity of these tools., Results: Of the 1885 participants, the prevalence of common mental disorders and suicide risk was 24.4 % and 14.9 %, respectively. The PHQ-9, GAD-7, and PC-PTSD-5 showed good internal consistency (0.80-0.89). All screeners demonstrated good criterion validity. For depression, a cut-off of ≥5 on the PHQ-9 yielded sensitivity of 84.24 %, while ≥10 yielded sensitivity of 48.77 %. For anxiety, the GAD-7 performed similarly. A cut-off of ≥4 on the PC-PTSD yielded sensitivity of 61.96 %. The C-SSRS yielded lower sensitivity than expected., Limitations: The prevalence data is not generalizable to the larger South African adult population given the use of a targeted, healthcare facility-based sampling and recruitment strategy., Conclusions: The performance of the PHQ-9, GAD-7, and PC-PTSD-5 demonstrated good internal consistency and criterion validity, though sensitivity and specificity trade-offs were enhanced with lower cut-offs. Further research into suicide risk screening is warranted., Competing Interests: Declaration of competing interest None., (Copyright © 2024 Elsevier B.V. All rights reserved.)
- Published
- 2024
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