Educational level
1 = School only
2 = Undergraduate
3 = Postgraduate

1 = Female
2 = Male

Time to first cigarette of day
1 = <6 min
2 = 6-30 min
3 = 31-60 min
4 = >60 min

Group randomised
0 = Reduced version
1 = Full version

Days between setting quit date and quit date
0 = 1-3 days previously
1 = Same day
2 = In future

Abstinent at 3 months
0 = Not abstinent
1 = Abstinent

0 = iOS
1 = Android

0 = Not eligible
1 = Eligible