Table 1 Variables of the study

1

Outcomes

1.a

Current Smoker

During the past 30 days, on how many days did you smoke cigarettes?

Respondents who responded with a value of 0 were classified as non-smokers, while those who responded with a value of 1 or more were classified as current smokers

1.b

Smoking susceptibility

1. If one of your best friends offered you a cigarette product, would you use it?

2. At any time during the next 12 months do you think you will consume cigarette in any form?

Respondents who responded with “definitely not” on both questions were classified as non susceptible, while others classified as susceptible

2

Covariates

2.a

Characteristics of Respondents

2.a.i

Sex

What is your sex?

Respondents answered Male or Female for this question

2.a.ii

Grade

In what grade/form are you?

Respondents answered number 7, 8, 9, 10, 11 or 12 for this question, and after that we classified number 7, 8, and 9 as Junior High School and number 10, 11, and 12 as Senior High School

2.a.iii

Weekly spending money

During an average week, how much money do you have that you can spend on yourself, however you want?

Respondents answered: more than IDR 50,000, IDR 41,000–50,000, IDR 31,000–40,000, IDR 21,000–30,000, IDR 11,000–20,000, less than IDR 11,000, or usually don't have any spending money, for this question

2.b

Accessibility to buy or consume cigarette

Can you purchase cigarettes near your school?

Respondents answered Easy or Difficult for this question

2.c

Second hand smoking

2.c.i

Saw anyone smoking in the house

During the past 7 days, on how many days has anyone smoked inside your home, in your presence?

Respondents who responded with a value of 0 day were categorized as No, while those who responded with a value of 1 day or more were categorized as Yes

2.c.ii

Saw anyone smoking in the school

During the past 30 days, did you see anyone smoke inside the school building or outside on school property?

Respondents answered Yes or No for this question

2.c.iii

Parents smoke tobacco

Do your parents smoke tobacco?

Respondents answered Yes or No for this question

2.d

Tobacco advertisement, promotion and sponsorship (TAPS) exposure

2.d.i

Tobacco advertisement exposure

1. During the past 30 days, did you see any people using tobacco on TV, in videos, or in movies?

2. Over the past 30 days, have you seen cigarette advertisements/promotions/brand names/cigarette logos on television?

3. During the past 30 days, did you see any advertisements for cigarette products in newspapers or magazines?

4. During the past 30 days, did you see any cigarette advertisements in outdoor media? (such as billboards, banners, posters, digital billboards)

5. During the past 30 days, did you see any cigarette advertisements when you opened in the internet or social media?

6. During the past 30 days, did you see any advertisements or promotions for cigarette products in sales centers (such as shops, stalls, kiosks and minimarket)?

Respondents answered Yes or No in each questions, and after that we calculate Yes and No question and classified as No Exposure, One Type Exposure and More Than One Exposure

2.d.ii

Tobacco promotion exposure

1. Would you ever use or wear something that has a cigarette company or cigarette product name or picture on it such as a match, t-shirt, hat, or sunglasses?

2. Do you have something (for example, t-shirt, pen, backpack, hat or sun glasses) with a cigarette product brand logo on it?

3. Has a person working for a tobacco company ever offered you a free tobacco product?

4. Have you ever got free cigarettes/discounted cigarette coupons/vouchers from cigarette companies?

Respondents answered Yes or No in each questions, and after that we calculate Yes and No question and classified as No Exposure, One Type Exposure and More Than One Exposure

2.d.iii

Tobacco sponsorship exposure

1. During the past 30 days, did you see any advertisements for cigarette products when you attended sports events?

2. During the past 30 days, did you see any advertisements for cigarette products at music concerts?

3. During the past 30 days, did you see any advertisements for cigarette products at community events/social gatherings?

Respondents answered Yes or No in each questions, and after that we calculate Yes and No question and classified as No Exposure, One Type Exposure and More Than One Exposure

3

Independents

3.a

Anti-Smoking Exposure

3.a.i

Anti-smoking messages on media (i.e.: television, radio, internet, billboards, posters, newspapers, magazines, or movies)

During the past 30 days, did you see or hear any anti-cigarette media messages on television, radio, internet, billboards, posters, newspapers, magazines, or movies?

Respondents answered Yes or No for this question

3.a.ii

Anti-smoking message at events (i.e.: sports events, fairs, concerts, or community events, or social gatherings)

During the past 30 days, did you see or hear any anti-cigarette messages at sports events, fairs, concerts, or community events, or social gatherings?

Respondents answered Yes or No for this question

3.a.iii

Anti-smoking messages in the school

During the past 12 months, were you taught in any of your classes about the dangers of tobacco use?

Respondents answered Yes or No for this question