(1) Primary outcome
Self-reported average number of cigarettes smoked per day and secondhand smoking exposure (hours of secondhand smoke exposure in the building in the past 7 days) will be measured at baseline (in-person interview), 3 months (phone interview), and 12 months (in-person interview). Salivary cotinine will be measured for 25% of the sample at at least two timepoints across all assessment timepoints for smokers to evaluate reliability of self-reported smoking behavior in Aim 1 and for non-smokers to evaluate self-reported secondhand smoke exposure in Aim 2.To examine the intervention group differences in the change of self-reported smoking (Aim 1), we will use GLMRM with identity link, 