Effects of household, workplace, and public place smoking restrictions on smoking cessation.

The aim of this study was to evaluate the association between environmental smoking restrictions, distinguished by site, and smoking cessation by Chinese urban residents. Recruited through multi-stage quota-sampling, residents in six Chinese cities were surveyed. Data were both individual-level and city-level. Among 4735 respondents, 715 were identified as successful quitters and 405 as unsuccessful. Multilevel logistic regression analysis showed smoking cessation to be associated with city-level public place and workplace restrictions and individual-level workplace and household restrictions. Results offer justification for decision-makers to implement environmental tobacco control policies and related public health interventions aimed at markedly diminishing the high smoking prevalence in China.