This review examines the methodological approaches used in district hospital systems across Tanzania to evaluate their effectiveness in risk reduction. A systematic review approach was employed, examining existing literature on district hospital systems in Tanzania. Quantitative data from recent randomized field trials were analysed using mixed-effects logistic regression models to assess intervention efficacy. The analysis revealed a significant reduction (p < 0.05) in patient readmission rates after the implementation of targeted interventions in four out of seven randomly selected districts. This study highlights the potential of randomized field trials in district hospitals for improving health outcomes and suggests further research to validate these findings across different regions. District hospital managers should prioritise ongoing monitoring and evaluation of intervention effectiveness while expanding access to healthcare services and resources. district hospitals, risk reduction, randomized field trial, Tanzania, mixed-effects logistic regression Treatment effect was estimated with $\text{logit}(p_i)=\beta_0+\beta^\top X_i$, and uncertainty reported using confidence-interval based inference.