Cronbach��s Alpha was 0.72. Awareness of the harm of (secondhand) smoking was measured with two questions ��In the last month, how often, if at all, did you think about the harm your smoking might be doing to you?�� and ��In the last month, how often, if at all, did you think about the harm your smoking might be doing to other people?�� selleckbio (Nagelhout, Van den Putte, et al., 2012). Response categories were ��Never�� (1), ��Rarely�� (2), ��Sometimes�� (3), ��Often�� (4), and ��Very often�� (5). Cronbach��s Alpha was 0.67. Psychosocial Mediators (2008, 2010) Attitudes about quitting were assessed using the question ��If you quit smoking within the next 6 months, this would be���� Respondents could answer on three 5-point scales, whether they thought this would be wise or unwise, pleasant or unpleasant, and positive or negative (Van den Putte, Yzer, Brunsting, & Willemsen, 2005).
Cronbach��s Alpha was 0.87. Subjective norm about quitting was measured with the question ��How do you think that most of the people who are important to you would feel about your quitting smoking within the next 6 months?�� (Van den Putte, Yzer, & Brunsting, 2005). Response categories were ��Strongly disapprove�� (1), ��Disapprove�� (2), ��Neutral�� (3), ��Approve�� (4), ��Strongly approve�� (5). Self-efficacy for quitting was measured using the questions ��Suppose you want to quit smoking within the next 6 months, will you be able to resist smoking when: �� you just woke up?��, ���� you have experienced something annoying?��, ���� you are having a cup of coffee or tea?��, ���� you are drinking alcohol?��, ���� you are offered a cigarette?�� (Hoving, Mudde, & de Vries, 2006).
Response categories were ��I will certainly not be able�� (1), ��I will probably not be able�� (2), ��May be I will be able, may be not�� (3), ��I will probably be able�� (4), and ��I will certainly be able�� (5). Cronbach��s Alpha was 0.88. Intention to quit was assessed with a single question: ��Are you planning to quit smoking: within the next month?�� (4), ���� within the next 6 months?�� (3), �� �� sometime in the future, beyond 6 months�� (2), ���� or are you not planning to quit?�� (1) (De Vries, Mudde, Dijkstra, & Willemsen, 1998). Policy-Relevant Outcomes (2011) Whether respondents had attempted to quit smoking was measured with the question: ��Have you made any attempts to stop smoking since the last survey?�� (Hyland et al.
, 2006). Quit success was assessed by asking respondents who had Cilengitide attempted to quit whether they were back to smoking or still stopped. Respondents who where still stopped or who were back to smoking, but reporting smoking less than once a month, were defined as successful quitters. Respondents who did not attempt to quit, or who were back to smoking more than once a month, were defined as smokers (Hyland et al., 2006).