Decline of common mental disorders over time in public primary care tuberculosis patients in South Africa

The relationship between tuberculosis and common mental disorders over time is under researched. The aim of this investigation was to estimate the prevalence of common mental disorders and its predictors among tuberculosis patients over a period of six months. A longitudinal investigation was carried out with new tuberculosis and tuberculosis retreatment patients systematically selected from 40 primary health care facilities and had screened positive for hazardous or harmful alcohol use in South Africa. Common mental disorders were measured with the Kessler-10 scale and the Primary Care Posttraumatic Stress Disorder Screen at baseline and at six months. At six months, 710 tuberculosis patients had completed the follow up. At baseline, 34.1% had severe psychological distress with a higher cut-off score (28), 81.1% had moderate psychological distress with a lower cut-off score (16), and 29.4% had posttraumatic stress disorder symptoms (two or more). At the six-month follow-up, severe psychological stress significantly reduced by 12.3%, moderate psychological distress reduced by 24.9%, and PTSD reduced by 20.0%. Multivariate logistic regression analysis using generalized estimation equation modeling across the three mental conditions found that moderate psychological distress and PTSD symptoms but not severe psychological distress significantly reduced over time.