"background": "Community health centres (CHCs) are a cornerstone of primary healthcare in South Africa, yet robust longitudinal evidence quantifying their impact on population health risk is limited. Existing evaluations often lack the methodological rigour to account for unobserved heterogeneity and dynamic effects over time. ", "purpose and objectives": "This study aimed to quantify the causal effect of CHC system functionality on key population health risk indicators, specifically under-five mortality and hypertension prevalence, using a novel panel-data econometric approach. ", "methodology": "We constructed a unique, district-level panel dataset from national health surveys, facility audits, and administrative records. The core analysis employed a two-way fixed effects model with robust standard errors, specified as: Y{it = \0 + \1 CHCit + it^\\ + \ + \ +, where Yit is the health outcome, CHCit is a composite functionality index, it are time-varying controls, and \ and \ₜ are district and year fixed effects. ", "findings": "A one-standard-deviation increase in CHC functionality was associated with a significant 4. 2% reduction in under-five mortality (95% CI: 2. 1% to 6. 3%). The relationship with hypertension prevalence was negative but not statistically significant at conventional levels. Results were robust to alternative model specifications and sensitivity analyses. ", "conclusion": "Enhanced functionality of CHC systems has a statistically significant and meaningful protective effect on child health outcomes. The findings underscore the critical role of investing in integrated primary care infrastructure for reducing population health risk. ", "recommendations": "Policy should prioritise sustained investment in CHC operational resources, staff training, and supply chains. Future research should investigate the mechanisms linking functionality to specific disease outcomes and explore cost-effectiveness. ", "key words": "primary healthcare, fixed effects
Thandiwe Nkosi (2011) studied this question.