Active smoking during adolescence |
No | 8.4 (160/1907) | | 3.2 (58/1805) | | 1.6 (27/1739) | |
Yes | 22.6 (222/983) | 2.30 (1.88 to 2.82) | 11.4 (98/859) | 2.76 (1.99 to 3.84) | 4.7 (37/780) | 2.56 (1.55 to 4.21) |
Duration of active smoking (years) |
Never | 8.4 (160/1907) | | 3.2 (58/1805) | | 1.6 (27/1739) | |
⩽2 | 16.8 (65/388) | 1.82 (1.38 to 2.40) | 8.0 (28/351) | 2.13 (1.37 to 3.33) | 2.5 (8/323) | 1.43 (0.65 to 3.17) |
2–4 | 24.3 (102/419) | 2.45 (1.92 to 3.11) | 10.7 (38/355) | 2.55 (1.69 to 3.85) | 5.7 (19/331) | 3.11 (1.71 to 5.65) |
>4 | 31.6 (49/155) | 3.10 (2.32 to 4.15) | 22.1 (30/136) | 4.95 (3.24 to 7.57) | 7.3 (8/110) | 3.97 (1.84 to 8.57) |
Intensity of active smoking |
Never | 8.4 (160/1907) | | 3.2 (58/1805) | | 1.6 (27/1739) | |
Occasionally | 14.3 (24/168) | 1.58 (1.06 to 2.36) | 7.7 (12/156) | 2.13 (1.17 to 3.87) | 2.7 (4/146) | 1.63 (0.58 to 4.58) |
Daily ⩽10 cigs | 19.5 (85/435) | 2.13 (1.66 to 2.74) | 9.3 (36/386) | 2.42 (1.61 to 3.64) | 4.3 (15/352) | 2.46 (1.31 to 4.63) |
Daily >10 cigs | 29.7 (111/374) | 2.95 (2.31 to 3.77) | 16.0 (50/313) | 3.66 (2.47 to 5.43) | 6.5 (18/278) | 3.34 (1.80 to 6.19) |