| Items | n | (%) | |
| Gender | |||
| Male | 2963 | (49.6) | |
| Female | 3011 | (50.4) | |
| Classification | |||
| Elementary school | 5106 | (85.5) | |
| Junior high school | 868 | (14.5) | |
| Smoker in family | |||
| No | 2688 | (45.0) | |
| Yes | 3286 | (55.0) | |
| Father | 2365 | (72.0) | |
| Mother | 1012 | (30.8) | |
| Parents | 631 | (19.2) | |
| Conversation about cigarettes with the family | |||
| Yes | 3452 | (57.8) | |
| No | 2522 | (42.2) | |
| Intention to speak about SPEP with family | |||
| Yes | 3702 | 62.0 | |
| No | 2272 | 38.0 | |