Table 1—

Crude association of leisure time activity and different potential confounders with 12-months prevalence of wheeze

n/N% (95% CI)
Sports
 ≤Once per month76/54613.9 (11.0–16.8)
 ≤Once per week124/93713.2 (11.0–15.4)
 2–3 times per week93/9469.8 (7.9–11.7)
 >3 times per week37/4538.2 (5.7–10.7)
Computer work
 ≤1 h·day−1216/176612.2 (10.7–13.7)
 >1 h·day−171/8088.8 (6.8–10.8)
TV watching
 ≤1 h·day−1103/93611.0 (9.0–13.0)
 >1 h·day−1214/186411.5 (10.1–12.9)
Visiting discotheques
 No107/10829.9 (8.1–11.7)
 Yes181/140412.9 (11.1–14.7)
Active smoking
 No143/19007.5 (6.3–8.7)
 Yes186/97019.2 (16.7–21.7)
Passive smoking
 No71/9747.3 (5.7–8.9)
 Yes255/189513.5 (12.0–15.0)
BMI kg·m−2
 ≥95th percentile15/13910.8 (5.6–16.0)
 <95th percentile315/275511.4 (10.2–12.6)
Sex
 Female214/161113.3 (11.6–15.0)
 Male116/12839.0 (7.4–10.6)
SES
 Low160/132612.1 (10.3–13.9)
 High156/150610.4 (8.9–11.9)
  • n: number of subjects with wheeze; N: number of subjects who answered affirmative; CI: confidence interval; BMI: body mass index; SES: socioeconomic status. Sport and computer work were significantly negatively associated with wheeze (p = 0.001 and 0.01). In contrast, visiting discotheques was significantly positively associated with current wheeze (p = 0.02). Smoking and female sex were significantly associated with incidence of wheeze in adolescence.