Leisure time activity and 12-months prevalence of wheeze
| Activity | New onset of wheeze | |||||
| Nonsmokers | Smokers | |||||
| n/N | % (95% CI) | p-value | n/N | % (95% CI) | p-value | |
| Sports | 0.18 | 0.46 | ||||
| ≤Once per month | 21/260 | 8.1 (4.8–11.4) | 55/281 | 19.6 (15.0–24.2) | ||
| ≤Once per week | 56/612 | 9.2 (6.9–11.5) | 67/317 | 21.1 (16.6–25.6) | ||
| 2–3 times per week | 44/670 | 6.6 (4.7–8.5) | 49/269 | 18.2 (13.6–22.8) | ||
| >3 times per week | 22/351 | 6.3 (3.8–8.8) | 15/98 | 15.3 (8.2–22.4) | ||
| Computer work | 0.13 | 0.30 | ||||
| ≤1 h·day−1 | 93/1134 | 8.2 (6.6–9.8) | 122/616 | 19.8 (16.7–22.9) | ||
| >1 h·day−1 | 37/598 | 6.2 (4.3–8.1) | 34/206 | 16.5 (11.4–21.6) | ||
| TV watching | 0.91 | 0.26 | ||||
| ≤1 h·day−1 | 52/694 | 7.5 (5.5–9.5) | 51/234 | 21.8 (16.5–27.1) | ||
| >1 h·day−1 | 85/1157 | 7.3 (5.8–8.8) | 128/694 | 18.4 (15.5–21.3) | ||
| Visiting discotheques | 0.51 | 0.52 | ||||
| No | 62/855 | 7.3 (5.6–9.0) | 45/217 | 20.7 (15.3–26.1) | ||
| Yes | 62/764 | 8.1 (6.2–10.0) | 118/629 | 18.8 (15.7–21.9) | ||
n: number of subjects with wheeze; N: number of subjects who answered affirmative; CI: confidence interval. Stratifying the analysis in smokers and nonsmokers, there was no significant association between leisure time activity and wheeze.