Gender, age and social grade of never smokers
| Never smoker | Non-susceptible | Susceptible | |
|---|---|---|---|
| n=1025 | n=733 | n=286 | |
| N (%) | N (%) | N (%) | |
| Gender | |||
| Male | 528 (51.5) | 373 (51) | 152 (53) |
| Female | 497 (48.5) | 360 (49) | 134 (47) |
| Age | |||
| 11 | 215 (21) | 171 (23) | 43 (15) |
| 12 | 204 (20) | 146 (20) | 56 (20) |
| 13 | 206 (20) | 138 (19) | 67 (23) |
| 14 | 176 (17) | 119 (16) | 55 (19) |
| 15 | 132 (13) | 86 (12) | 46 (16) |
| 16 | 92 (9) | 73 (10) | 19 (7) |
| Social grade | |||
| ABC1 | 462 (46) | 330 (46) | 132 (47) |
| C2DE | 548 (54) | 391 (54) | 151 (53) |