very useful
somewhat useful
not useful at all
no cigarette
<1 per day
1-10 cigs per day
10-20 cigs per day
>20 cigs per day
best 3
best 6
best 9
bottom 9
bottom 6
bottom 3
<8pm
8-9pm
9-10pm
10-11pm
11-12pm
12pm-1am
1-2am
>2am
never
almost never
sometimes
fairly often
very often
more
less
same
all of the time
often
rarely
almost every day
most days a week
once or twice a week
once or twice a month
usually
sometimes/occasionally
<once a week
once a week
every 2-3 days
once a day
twice a day
at least 3 times a day
yes
no
almost always
most days