From: Long-term effectiveness of adolescent brief tobacco intervention: a follow-up study
 |  | Never-smokers | Ex-smokers | Smokers | All | p-value | |
---|---|---|---|---|---|---|---|
 |  | % | % | % | n | % |  |
Gender | Â | Â | Â | Â | Â | Â | Â |
   Female |  |  |  |  |  |  | 0.48 |
 | Intervention group | 55.4 | 31.7 | 12.9 | 303 | 100 |  |
 | Control group | 55.1 | 28.8 | 16.1 | 292 | 100 |  |
   Male |  |  |  |  |  |  | 0.33 |
 | Intervention group | 45.5 | 35.7 | 18.8 | 213 | 100 |  |
 | Control group | 38.3 | 39.4 | 22.3 | 188 | 100 |  |
Marital status | Â | Â | Â | Â | Â | Â | Â |
   Single |  |  |  |  |  |  | 0.72 |
 | Intervention group | 54.4 | 21.6 | 24.0 | 125 | 100 |  |
 | Control group | 55.7 | 24.3 | 20.0 | 115 | 100 |  |
   Non-single |  |  |  |  |  |  | 0.10 |
 | Intervention group | 50.4 | 37.1 | 12.5 | 391 | 100 |  |
 | Control group | 46.3 | 35.6 | 18.1 | 365 | 100 |  |
Education | Â | Â | Â | Â | Â | Â | Â |
   Lower |  |  |  |  |  |  | 0.04 |
 | Intervention group | 39.7 | 38.5 | 21.8 | 174 | 100 |  |
 | Control group | 32.9 | 32.9 | 34.1 | 164 | 100 |  |
   Higher |  |  |  |  |  |  | 0.59 |
 | Intervention group | 57.1 | 30.8 | 12.1 | 338 | 100 |  |
 | Control group | 56.7 | 33.3 | 9.9 | 312 | 100 |  |
Self-perceived health | Â | Â | Â | Â | Â | Â | |
   Very good |  |  |  |  |  |  | 0.60 |
 | Intervention group | 63.8 | 29.7 | 6.5 | 138 | 100 |  |
 | Control group | 58.9 | 31.9 | 9.2 | 141 | 100 |  |
   Not very good |  |  |  |  |  |  | 0.42 |
 | Intervention group | 46.8 | 34.7 | 18.5 | 378 | 100 |  |
 | Control group | 44.1 | 33.4 | 22.5 | 338 | 100 |  |