Outcome measures
MTSS
Participants were followed up at 4, 12 and 26wks after baseline where they completed a questionnaire to collect outcome, process and cost data. Self-reported quitting was validated using a semi-quantitative salivary nicotine test (NicAlertThe primary outcome was the proportion of smokers who quit at 4wks (7-day point prevalence abstinence), biochemically validated with salivary cotinine (1) < 10ng/ml, or (2) < 100ng/ml for those who reported exposure to second hand cigarette smoke in the home on a daily basis, or (3) ≥ 10ng/ml in those who reported using Nicotine Replacement Therapy (NRT)/e-cigarettes at any time point during the study, irrespective of exposure to second hand cigarette smoke). Secondary outcomes were biochemically validated (as above) 7-day point prevalence abstinence at 12wks and 26wks, proportion who reported quitting smoking (self-report 7 day point prevalence abstinence), proportion who attempted to quit smoking, proportion who reduced the number of cigarettes smoked per day and motivation to quit smoking as measured by the motivation to stop smoking scale (MTSS) [