Outcome variable
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Susceptibility to smoking
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1. If one of your friends offered you a cigarette, would you smoke it?
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1 = Definitely not
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Students who are currently non-smokers and answered “Definitely not” to all 3 questions were coded as “non-susceptible”, and all other students were labeled as “susceptible” to smoking.
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2 = Probably not
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3 = Probably yes
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3 = Probably yes
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2. At any time during the next 12 months, do you think you will smoke a cigarette?
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2. At any time during the next 12 months, do you think you will smoke a cigarette?
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2. At any time during the next 12 months, do you think you will smoke a cigarette?
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3 = Probably yes
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4 = Definitely yes
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3. Do you think, you will be smoking a cigarette 5 years now?
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1 = Definitely not
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2 = Probably not
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3 = Probably yes
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4 = Definitely yes
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Independent variables
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Age in years (categorical)
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How old are you?
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1 = 11 years old or younger
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1 = Aged ≤ 13
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2 = 12 years old
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2 = Aged > 13
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3 = 13 years old
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4 = 14 years old
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5 = 15 years old
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6 = 16 years old
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7 = 17 years old or older
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Parents’ smoking status
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Do your parents smoke?
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1 = None
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1 = None
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2 = Both
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2 = At least one parent smokes
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3 = Father only
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3 = I don’t know
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4 = Mother only
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5 = I don’t know
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Friends’ smoking status
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Do any of your closest friends smoke cigarettes?
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1 = None of them
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1 = Do not have friends who smoke
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2 = Some of them
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2 = Have friends who smoke
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3 = Most of them
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4 = All of them
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Classes on harmful effects of smoking
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During this school year were you taught in any of your classes about the dangers of smoking?
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1 = Yes
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1 = Did attend
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2 = No
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2 = Did not attend
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3 = Not sure
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Access to anti smoking media
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During the past 30 days (1 month) how many anti-smoking media messages (e.g. television, radio, billboards, posters, newspapers, magazines, movies) have you seen?
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1 = A lot
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1 = Yes
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2 = A few
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2 = No
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3 = None
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Exposure to billboards cigarette marketing
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During the past 30 days (1 month) how many advertisements for cigarettes have you seen on billboards?
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1 = A lot
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1 = Yes
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2 = A few
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2 = No
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3 = None
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Exposure to newspapers/magazines cigarette marketing
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During the past 30 days (1 month) how many advertisements or promotions for cigarettes have you seen in newspapers or magazines?
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1 = A lot
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1 = Yes
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2 = A few
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2 = No
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3 = None
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Boys who smoke have “more or less friends
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Do you think boys who smoke cigarettes have more or less friends?
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1 = More friends
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1 = More friends
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2 = Less friends
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2 = Less friends or no difference
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3 = No difference from nonsmokers
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Girls who smoke have more or less friends
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Do you think girls who smoke cigarettes have more or less friends?
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1 = More friends
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1 = More friends
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2 = Less friends
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2 = Less friends or no difference
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3 = No difference from nonsmokers
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Boys who smoke are more or less attractive
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Do you think smoking cigarettes make boys more or less attractive?
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1 = More attractive
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1 = More attractive
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2 = Less attractive
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2 = Less attractive or no difference
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3 = No difference from nonsmokers
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Girls who smoke are more or less attractive
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Do you think smoking cigarettes make girls more or less attractive?
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1 = More attractive
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1 = More attractive
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2 = Less attractive
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2 = Less attractive or no difference
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3 = No difference from nonsmokers
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People who smoke are more or less comfortable at social gatherings
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Does smoking cigarettes help people feel more comfortable at celebrations, parties or in other social gatherings?
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1 = More comfortable
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1 = More comfortable
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2 = Less comfortable
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2 = Less comfortable or no difference
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3 = No difference from nonsmokers
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Knowledge of harmful effects of smoking
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Do you think cigarette smoking is harmful to your health?
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1 = Definitely not
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0 = Poor knowledge (response 1-3)
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2 = Probably not
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1 = Good knowledge (response 4)
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3 = Probably yes
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4 = Definitely yes
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Knowledge of harmful effects of secondhand smoke
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Do you think smoke from other people’s cigarette is harmful to you?
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1 = Definitely not
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0 = Poor knowledge (response 1-3)
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2 = Probably not
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1 = Good knowledge (response 4)
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3 = Probably yes
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4 = Definitely yes
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Ever tried cigarette smoking
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Have you ever tried or experimented with cigarette smoking, even one or two puffs?
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1 = Yes
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1 = Ever smoked
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2 = No
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0 = Never smoked
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