1 = Male
2 = Female

1 = Primary School
2 = Secondary school
3 = Pra-University/ STPM/ Diploma
4 = Degree

1 = Everyday
2 = At least once a week
3 = Rarely

1 = Less than a year
2 = 2- 5 years
3 = 6-10 years
4 = More than 10 years

1 = Less than 10 sticks
2 = More than 10 sticks
3 = Less than one box
4 = More than one box

1 = Yes
2 = No

1 = Never
2 = rarely
3 = Sometimes
4 = Often
5 = Always

1 = Never
2 = Rarely
3 = Sometimes
4 = Often
5 = Always

1 = Yes
2 = No
3 = Not sure

1 = Smoker
2 = Non-smoker