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Table 5 Crude and adjusted associations for current asthma i.e. Asthma Definition [2] by physical activity categorised (0-7+ hours per week), odds ratio and 95% confidence interval

From: Associations of physical activity with childhood asthma, a population study based on the WHO - health behaviour in school-aged children survey

  Boys Girls
“Current Asthma” (%, n, total) (7.0, 160, 2295) (7.2, 173, 2418)
PA (all groups) (n) 2323 2448
0 h/wk. (%, n) 9.3, 216 11.2, 275
 Crude OR (95% CI)a 0.45 (0.20; 1.03)P = 0.060 0.81 (0.41; 1.57)P = 0.528
 Adjusted OR (95% CI)b 0.27 (0.12; 0.60)P = 0.002 0.56 (0.28; 1.14)P = 0.108
0.5 h/wk. (%, n) 5.6, 129 6.3, 153
 Crude OR (95% CI)a 0.76 (0.33; 1.78)P = 0.529 0.52 (0.21; 1.32)P = 0.171
 Adjusted OR (95% CI)b 0.48 (0.20; 1.16)P = 0.102 0.32 (0.11; 0.94)P = 0.039
1 h/wk. (%, n) 9.6, 223 15.6, 382
 Crude OR (95% CI)a 0.77 (0.40; 1.46)P = 0.417 0.63 (0.31; 1.27)P = 0.198
 Adjusted OR (95% CI)b 0.55 (0.28; 1.06)P = 0.073 0.52 (0.26; 1.01)P = 0.055
2–3 h/wk. (%, n) 28.6, 664 33.5, 819
 Crude OR (95% CI)a 0.99 (0.62; 1.58)P = 0.981 0.91 (0.51; 1.63)P = 0.747
 Adjusted OR (95% CI)b 0.76 (0.46; 1.27)P = 0.299 0.82 (0.46; 1.46)P = 0.496
4–6 h/wk. (%, n) 27.2, 631 22.4, 549
 Crude OR (95% CI)a 1.34 (0.83; 2.15)P = 0.231 0.85 (0.44; 1.64)P = 0.631
 Adjusted OR (95% CI)b 1.21 (0.72; 2.03)P = 0.479 0.77 (0.39; 1.51)P = 0.444
7+ h/wk. (%, n) 19.8, 460 11.0, 270
Ref 1.00 1.00
P linear trend = 0.007 = 0.229
  1. HBSC Health Behaviour in School-aged Children, H Hour/s, Mod Moderate, Ref Reference category, WHO World Health Organization, Wk Week
  2. aUnivariate analysis i.e. crude effect of PA (n boys: 2277; n girls: 2397)
  3. bMultivariate analysis i.e. “full confounder adjustment model” (n boys: 2265; n girls: 2319)
  4. Adjustments (male: Grade, self-rated health; female: Grade, self-rated health, menarche)
  5. P: Chi2
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Asthma Research and Practice

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