This retrospective study aimed to address whether or to what extent spatial
and non-spatial factors with a focus on a healthcare delivery system would influence
successful tuberculosis (TB) treatment outcomes in Urmia, Iran. In this crosssectional
study, data of 452 new TB cases were extracted from Urmia TB Management
Center during a 5-year period. Using the Geographical Information System
(GIS), health centers and study subjects locations were geocoded on digital maps.
To identify the statistically significant geographical clusters, Average Nearest
Neighbor (ANN) index was used. Logistic regression analysis was employed to
determine the association of spatial and non-spatial variables on the occurrence