Smoking status
1 = Current smoker
2 = Ex-smoker
3 = Never smoker

How many cigarettes do you smoke per day?
1 = 1 to 5
2 = 6 to 10
3 = 11 to 15
4 = 16 to 20
5 = 21+
6 = Current smoker, do not smoke cigarettes

In relation to non-smokers, are smokers' breaks...?
1 = shorter
2 = the same
3 = longer

1 = male
2 = female

1 = up to 34
2 = 35 to 44
3 = 45+