Percentage (n) of self-reported and cotinine adjusted current smoking (smoking sometimes or more often) and new current smoking (current smoking for the first time) at each study year
| Year 7 | Year 8 | Year 9 | Year 10 | Year 11 | |
|---|---|---|---|---|---|
| Self-reported current smoking | 1.1 (23) | 5.1 (104) | 12.4 (253) | 22.8 (465) | 28.6 (584) |
| Cotinine-adjusted current smoking | 1.3 (26) | 5.1 (105) | 12.5 (255) | 23.0 (469) | 29.3 (597) |
| Cotinine-adjusted new current smoking | – | 3.9 (80) | 6.8 (139) | 8.2 (168) | 6.9 (141) |