Predictors of cessation in smokers suspected of TB: Secondary analysis of data from a cluster randomized controlled trial

Highlights • We explore the predictors of cessation among those suspected of tuberculosis in a smoking cessation trial in Pakistan. • The trial found behavioral support, with and without bupropion, effective in achieving smoking abstinence at 25 weeks compared to usual care. • We found older age, more tobacco smoked, smokers in the workplace predicted continued smoking and a diagnosis of TB predicted quit success. • Where resources are scarce, each contact with health workers must be optimized. • Contact with TB services provides a valuable teachable moment for effective tobacco cessation.