Association Between Distance From Home to Tobacco Outlet and Smoking Cessation and Relapse.

Importance: Reduced availability of tobacco outlets is hypothesized to reduce smoking, but longitudinal evidence on this issue is scarce.

Objective: To examine whether changes in distance from home to tobacco outlet are associated with changes in smoking behaviors.

Design, Setting, And Participants: The data from 2 prospective cohort studies included geocoded residential addresses, addresses of tobacco outlets, and responses to smoking surveys in 2008 and 2012 (the Finnish Public Sector [FPS] study, n = 53 755) or 2003 and 2012 (the Health and Social Support [HeSSup] study, n = 11 924).