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Background  In order to effectively combat Tuberculosis, resources to diagnose and treat TB should be allocated effectively to the areas and population that need them. Although a wealth of subnational data on TB is routinely collected to support local planning, it is often underutilized. Therefore, this study uses spatial analytical techniques and profiling to understand and identify factors underlying spatial variation in TB case notification rates (CNR) in Bangladesh, Nepal and Pakistan for better TB program planning.    Methods  Spatial analytical techniques and profiling was used to identify subnational patterns of TB CNRs at the district level in Bangladesh ( N  = 64, 2015), Nepal ( N  = 75, 2014) and Pakistan ( N  = 142, 2015). A multivariable linear regression analysis was performed to assess the association between subnational CNR and demographic and health indicators associated with TB burden and indicators of TB programme efforts. To correct for spatial dependencies of the observations, the residuals of the multivariable models were tested for unexplained spatial autocorrelation. Spatial autocorrelation among the residuals was adjusted for by fitting a simultaneous autoregressive model (SAR).    Results  Spatial clustering of TB CNRs was observed in all three countries. In Bangladesh, TB CNR were found significantly associated with testing rate (0.06%,  p  < 0.001), test positivity rate (14.44%,  p  < 0.001), proportion of bacteriologically confirmed cases (− 1.33%,  p  < 0.001) and population density (4.5*10–3%,  p  < 0.01). In Nepal, TB CNR were associated with population sex ratio (1.54%,  p  < 0.01), facility density (− 0.19%,  p  < 0.05) and treatment success rate (− 3.68%,  p  < 0.001). Finally, TB CNR in Pakistan were found significantly associated with testing rate (0.08%,  p  < 0.001), positivity rate (4.29,  p  < 0.001), proportion of bacteriologically confirmed cases (− 1.45,  p  < 0.001), vaccination coverage (1.17%,  p  < 0.001) and facility density (20.41%,  p  < 0.001).    Conclusion  Subnational TB CNRs are more likely reflective of TB programme efforts and access to healthcare than TB burden. TB CNRs are better used for monitoring and evaluation of TB control efforts than the TB epidemic. Using spatial analytical techniques and profiling can help identify areas where TB is underreported. Applying these techniques routinely in the surveillance facilitates the use of TB CNRs in program planning.

bmc infectious diseases

Finding gaps in TB notifications: spatial analysis of geographical patterns of TB notifications, associations with TB program efforts and social determinants of TB risk in Bangladesh, Nepal and Pakistan