Community health centres in Tanzania have been established to improve access to healthcare services. However, their effectiveness remains unclear. Panel data analysis was employed to assess the impact of interventions on patient outcomes over time. Robust standard errors were used to account for within-centre correlations. A significant proportion (75%) of patients showed reduced risk factors after attending community health centres, indicating a positive effect. The use of panel data significantly increased the precision and reliability of measuring risk reduction in healthcare settings. Continuous monitoring and periodic evaluations should be implemented to maintain optimal performance of community health centres. Treatment effect was estimated with $\text{logit}(p_i)=\beta_0+\beta^\top X_i$, and uncertainty reported using confidence-interval based inference.