Sample characteristics
| Characteristics | n (%) |
|---|---|
| Sex | |
| Female | 5049 (50) |
| Age | |
| 11 or 12 | 6191 (62) |
| 13 | 3470 (34) |
| 14 or more | 431 (4) |
| Parents' education | |
| Up to primary school complete | 2171 (22) |
| Completed secondary school | 3799 (38) |
| Completed high school or technical school | 1626 (16) |
| Completed university or more | 1573 (16) |
| Don't know | 858 (9) |
| Internet ad exposure | |
| Never | 5068 (50) |
| Rarely/sometimes | 4205 (42) |
| Mostly/always | 770 (8) |
| PoS exposure | |
| Low | 4337 (43) |
| Medium | 4304 (43) |
| High | 1472 (14) |
| Parental smoking | 4313 (43) |
| Sibling(s) smoking | 1580 (16) |
| Any friend smokes | 3577 (35) |
| Sensation seeking (1–5) mean (SD) | 2.88 (1.05) |
| Positive expectancies (1–5) mean (SD) | 1.82 (0.92) |
| Smoking | |
| Never-smoker, not susceptible | 5652 (57) |
| Never-smokers, susceptible | 1936 (19) |
| Experimenters | 1637 (16) |
| Current smokers | 826 (8) |
PoS, point of sale.