Results of the difference-in-differences analysis, adjusted for province and size-of-clinic strata, other important variables, and overall; the models included the arm and arm-b-aperiod interaction term.
TB
(a) Change in TB cases diagnosed in the nonintervention clinics from prestudy period. (b) Relative change in TB cases diagnosed in TUTT clinics from the preintervention period to the intervention period. 