Mean increase in body mass index and weight gain in men (18 years to recruitment) by smoking category at recruitment
| Smoking category | Number | Mean increase in body mass index (kg/m2) (95% CI) | Mean increase in weight (kg) (95% CI) |
| Never smoked | 362 | 4.31 (3.95, 4.67) | 12.6 (11.5, 13.7) |
| Ex-smoker | 675 | 4.66 (4.38, 4.94) | 13.8 (13.0, 14.6) |
| Pipe/cigar | 250 | 4.11 (3.66, 4.56) | 12.2 (10.8, 13.5) |
| Cigarettes daily | |||
| 1–14 | 324 | 2.46 (2.04, 2.89) | 7.1 (5.9, 8.4) |
| 15–24 | 414 | 2.85 (2.50, 3.20) | 8.3 (7.3, 9.3) |
| 25+ | 297 | 3.69 (3.26, 4.12) | 10.9 (9.6, 12.1) |