Burden of Tuberculosis among tribal populations of India: A systematic review and meta-analysis

Abstract

Tuberculosis (TB) continues to impose a significant burden on tribal populations in India, a high-risk group for the disease. Despite its preventable and curable nature, TB remains a formidable health challenge for these communities. However, a critical knowledge gap exists regarding the population-based prevalence of TB among tribal populations in India. The current systematic review and meta-analysis were carried out to provide a single, population-based estimate. A comprehensive search was conducted on PubMed, Embase, Scopus, and Web of Science databases using the keywords ‘tuberculosis’, ‘TB’, and ‘tribal’ or ‘tribes’. This search encompassed articles published between 1 January 2000 and 1 March 2023. The included articles underwent a quality assessment screening to ensure their reliability and relevance. Subsequently, a pooled estimate of TB prevalence among tribal populations was quantified using a random-effects model. To investigate potential sources of heterogeneity in the prevalence estimates, subgroup analyses were performed. We identified 14 studies that encompassed a substantial population of 267,377 individuals from various regions in India belonging to tribal communities. The application of a random-effects model yielded a pooled prevalence estimate of 894.4 per 100,000 population, with a 95% confidence interval ranging from 523.5 to 1361.9. The assessment of heterogeneity using the Cochrane Q test indicated significant variability among the included studies (I2 = 99.17%; P < 0.001). Notably, the prevalence of TB among tribal populations was found to be higher than the national prevalence. The scientific evidence available for the prevalence of TB among tribal populations is restricted to a few tribes only. Conducting further research to estimate the prevalence among other tribes all over the country is the need of the hour and should be addressed accordingly.