Mental ability at age 11 years according to smoking status at midlife (n=926; 541 men and 385 women)
| Smoking status at midlife | ||||
|---|---|---|---|---|
| Never | Past | Current | Ever* | |
| Data are mean (SD) and number (%). | ||||
| *Combination of past and current smokers. | ||||
| †Significantly different from past smokers. t Test to compare never smokers and ever smokers (total sample: t924=0.71, p=0.476; for men: t539=1.17, p=0.242; for women: t383=1.08, p=0.283). Analysis of variance to compare never, past, and current smokers (total sample: F2, 925=7.65, p<0.001, η2=0.016; for men: F2, 538=4.25, p=0.015, η2=0.016; for women: F2, 382=3.40, p=0.035, η2=0.017). | ||||
| All | 100.5 (14.4) | 103.7 (14.3) | 98.5 (15.3)† | 99.7 (15.2) |
| 238 (25.7%) | 159 (17.2%) | 529 (57.1%) | 688 (74.3%) | |
| Men | 102.9 (15.7) | 103.9 (14.7) | 99.6 (15.4)† | 100.8 (15.3) |
| 85 (15.7%) | 125 (23.1%) | 331 (61.2%) | 456 (84.3%) | |
| Women | 99.2 (13.5) | 102.9 (13.1) | 96.7 (15.0) | 97.6 (14.9) |
| 153 (39.7%) | 34 (8.8%) | 198 (51.5%) | 232 (60.3%) | |