Table 1. Participants characteristics (N=1371) .
Mean (SD) or No. (%) | |
Age (y) | 15.5 (1.6) |
Gender (male) | 700 (51.1) |
Fathers’ educational year | 8.7 (2.1) |
Mothers’ educational year | 7.5 (2.6) |
Current smoker (yes) | 280 (20.4) |
Living condition: private room (yes) | 953 (69.5) |