age when starting to smoke

Phase 1: If you smoke cigarettes now or have smoked cigarettes regularly: How old were you when you started to smoke cigarettes? Age in years.

Years

Integer

BL smoking category

Phase 1: baseline smoking category. 0 = never smoked, 1 = ex-occasional, 2 = occasional, 3 = ex-regular smoker, 4 = Regular cigarette smoker, 5 = Regular cigar/pipe, 6 = Regular cigar, 7 = Regular pipe, 9 = no code

Categorical

young only Ever smoke

Phase 2: Unclear which question this refers to cigarettes? Cigars? Pipe?

Categorical

P1 nr of years since quitting

Phase 1: number of years since quitting

Years

Integer

nr of cigarettes per day

Phase 1: On average how many cigarettes do you usually smoke a day? If <1 per day: go to question S3, else go to question S4 (agestart). 0 = less than 1 per day

Integer

young only

Phase 2: Unclear which Q this relates to. If you stopped smoking in less than one year, please give stop length in number of months.

Real

young only

Phase 2: Unclear which Q this relates to. Have you ever smoked cigarettes regularly, by that we mean one or more a day for a year? Yes / No Or: Do you still smoke cigarettes regularly? Yes / No Or: have you ever smoked a pipe regularly? Yes / No Or: Do you still smoke a pipe regularly? Yes / No

Categorical

young only

Phase 2: Unclear which Q this relates to. Smoke cigarettes nowadays? Still smoke pipe regularly? Yes / No

Categorical

young only

Phase 2: Unclear which Q this relates to. Number of cigarettes smoked a day if >1? Or: How many cigarettes did you smoke a day when you last smoked regularly? Or: How many cigars do/did you usually smoke per week?

Real

None

Phase 2: Smoking category. 0 = Non-smoker; 1 = Ex-smoker; 2 = Current smoker; 3 = Other;

Text

BL smoking category

Phase 1: Baseline smoking category. 0 = Non-smoker; 1 = Ex-smoker; 2 = Current smoker; 3 = Other;

Categorical

None

Phase 2: Smoking category (old). 0 = Non-smoker; 1 = Ex-smoker; 2 = Current smoker; 3 = Other;

Text