| Influencing factors | Smokers | ||||
| Total n (%) | No n (%) | Yes n (%) | p | ||
| Parents who smoke | Yes | 691 (100) | 501 (72.5) | 190 (27.5) | 0.000 |
| No | 815 (100) | 701 (86.0) | 114 (14.0) | ||
| Have groups of friends who smoke | Yes | 564 (100) | 302 (53.5) | 262 (46.5) | 0.000 |
| No | 942 (100) | 900 (95.5) | 42 (4.5) | ||
| Habit to be sent to buy the cigarette | Yes | 248 (100) | 98 (39.5) | 150 (60.5) | 0.000 |
| No | 1258 (100) | 1104 (87.8) | 154 (12.2) | ||
| Habit to be sent to light the cigarette | Yes | 293 (100) | 213 (72.7) | 80 (27.3) |
0.001 |
| No | 1213(100) | 989 (81.5) | 224 (18.5) | ||
| Sell the cigarette | Yes | 355 (100) | 204 (57.5) | 151 (42.5) | 0.000 |
| No | 1151 (100) | 998 (86.7) | 153 (13.3) | ||
| Living with smokers in the plot | Yes | 617 (100) | 469 (76.0) | 148 (24.0) | 0.003 |
| No | 889 (100) | 733 (82.4) | 156 (17.6) | ||