Time since smoke-free law and smoking cessation behaviors.

Introduction: We examined the association between time since implementation of a smoke-free law and cessation behaviors among current and former smokers.
Methods: A quasiexperimental, three-group design assessed smoking and cessation behaviors via brief telephone interviews with 295 randomly selected current and former smokers who had quit since a smoke-free law took effect in their community. Participants lived in one of four communities that had implemented a smoke-free law in the preceding 6-8 months (n = 106), 18 months (n = 87), or 36 months (n = 102).
Results: Compared with those living in communities with relatively new smoke-free laws (6-8 months), those in communities with more established laws (18 and 36 months) were more likely to (a) be former smokers and (b) report a longer time since smoking their last cigarette. Compared with the 6- to 8-month group, those in the 36-month group were more likely to have tried to quit since the law was implemented.
Discussion: Smoke-free laws may have a delayed effect on cessation among adults. The longer a smoke-free law is in effect, the more likely adults will attempt to quit smoking and become former smokers. Maintaining the integrity of smoke-free laws over time is an important population-based quit strategy.