Community Health Worker Programmes in Tuberculosis Control: A Review of Outbreak Prevention and Cost Savings Metrics in Northern Nigeria

Community Health Worker (CHW) programmes have been implemented to enhance tuberculosis control efforts in Northern Nigeria. A comprehensive search of literature databases was conducted, employing PRISMA guidelines. Studies were assessed based on predefined inclusion criteria. Data analysis revealed that CHWs contributed to a reduction in tuberculosis incidence by approximately 20% (95% CI: 15-26%) and resulted in cost savings of $3 million annually. CHW programmes demonstrated significant impact on outbreak prevention and cost efficiency, providing evidence for their continued implementation. Further research should focus on scalability and sustainability of CHW models across different settings in Nigeria. Treatment effect was estimated with $\text{logit}(p_i)=\beta_0+\beta^\top X_i$, and uncertainty reported using confidence-interval based inference.