This study is part of the “Smoking Toolkit Study,” which is an ongoing research program designed to provide information about smoking prevalence and behavior (The Smoking Toolkit Study, 2011). Each month a new sample of approximately 1700

adults aged 16 and over completes a face-to-face computer-assisted survey, of whom approximately 500 will be smokers. The methods have been described in full elsewhere and have been shown to result in a sample that is nationally representative in its socio-demographic composition (Fidler et al., 2011a). We used data from respondents to the survey in the period from November 2008 (the wave in which buy Compound C the measure of motivation was added to the survey) to January 2011, who smoked cigarettes (including hand-rolled) or any other this website tobacco product (e.g., pipe or cigar) daily or occasionally at the time of the survey. All respondents

were asked if they were happy to be re-contacted. A follow-up questionnaire was sent to consenting respondents 6 months after baseline. Participants were given £5 ($8) remuneration and one reminder letter was sent. Of the 11,673 smokers at baseline, 2483 (21%) were followed-up 6 months later. This sample of respondents with baseline and follow-up data was used for the analyses in our current study. The MTSS consist of one item and was measured at baseline. Smokers were asked: “Which of the following describes you?”. The response categories (and codings) were: (1) “I don’t want to stop smoking”; (2) “I think I should stop smoking but don’t really want to”; (3) “I want to stop smoking

but haven’t thought about when”; (4) “I REALLY want to stop smoking but I don’t know when I will”; (5) “I want to stop smoking and hope to soon”; (6) “I REALLY want to stop smoking and intend to in the next 3 months”; (7) “I REALLY want to stop smoking and intend to in the next month”. The ordering reflects: 1, absence of any belief, desire or intention; 2, belief only; 3, moderate desire but no intention; 4, strong desire but no intention; 5, moderate desire and intention; 6, strong desire and medium-term intention; and 7, strong desire and short-term intention. no The MTSS also has “Don’t know” as a response category, but this was used by only 0.5% of smokers at baseline and these participants were counted as missing from the analysis. Respondents to the 6-month follow-up were asked: “Have you made a serious attempt to stop smoking in the past 12 months? By serious attempt I mean you decided that you would try to make sure you never smoked another cigarette? Please include any attempt that you are currently making.” Participants who responded “yes” were then asked how long ago the three most recent quit attempts started.