Number of ‘never smoking’ respondents by school and year group
| Year 1 | Year 2 | Year 3 | Year 4 | Year 5 | Year 6 | Total | |
| School 1 Accessible small town/medium–low deprivation | 207 24.1% | 184 21.5% | 193 22.5% | 129 15.0% | 93 10.8% | 52 6.1% | 858 100% |
| School 2Urban/medium–low deprivation | 147 19.9% | 175 23.7% | 136 18.4% | 134 18.2% | 85 11.5% | 61 8.3% | 738 100% |
| School 3 Other urban/high deprivation | 177 26.3% | 160 23.8% | 106 15.8% | 125 18.6% | 62 9.2% | 42 6.3% | 672 100% |
| School 4 Urban/high deprivation | 151 20.6% | 197 26.9% | 122 16.6% | 126 17.2% | 94 12.8% | 43 5.9% | 733 100% |
| Total | 682 | 716 | 557 | 513 | 333 | 197 | 3001 |
| Mean age (SD) | 12.5 (0.34) | 13.5 (0.34) | 14.6 (0.34) | 15.6 (0.35) | 16.6 (0.36) | 17.6 (0.32) | 14.4 (1.58) |