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Table 4 Crude and adjusted associations for ever asthma i.e. Asthma Definition [1] 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
“Ever Asthma” (%, n, total) (14.4, 336, 2330) (12.9, 316, 2454)
PA (all categories) (n) 2323 2448
0 h/wk. (%, n) 9.3, 216 11.2, 275
 Crude OR (95% CI)a 0.70 (0.40; 1.22)P = 0.207 0.79 (0.52; 1.19)P = 0.255
 Adjusted OR (95% CI)b 0.55 (0.30; 0.99)P = 0.046 0.62 (0.40; 0.97)P = 0.034
0.5 h/wk. (%, n) 5.6, 129 6.3, 153
 Crude OR (95% CI)a 0.94 (0.50; 1.77)P = 0.840 0.60 (0.32; 1.12)P = 0.109
 Adjusted OR (95% CI)b 0.73 (0.35; 1.53)P = 0.409 0.47 (0.24; 0.93)P = 0.030
1 h/wk. (%, n) 9.6, 223 15.6, 382
 Crude OR (95% CI)a 1.16 (0.70; 1.91)P = 0.576 0.69 (0.43; 1.12)P = 0.136
 Adjusted OR (95% CI)b 0.96 (0.53; 1.74)P = 0.897 0.60 (0.37; 0.98)P = 0.039
2–3 h/wk. (%, n) 28.6, 664 33.5, 819
 Crude OR (95% CI)a 1.05 (0.77; 1.43)P = 0.746 0.83 (0.57; 1.21)P = 0.332
 Adjusted OR (95% CI)b 1.00 (0.70; 1.42)P = 0.982 0.73 (0.50; 1.07)P = 0.104
4–6 h/wk. (%, n) 27.2, 631 22.4, 549
 Crude OR (95% CI)a 1.17 (0.88; 1.56)P = 0.270 0.82 (0.53; 1.28)P = 0.383
 Adjusted OR (95% CI)b 1.17 (0.84; 1.62)P = 0.353 0.72 (0.45; 1.15)P = 0.171
7+ h/wk. (%, n) 19.8, 460 11.0, 270
Ref 1.00 1.00
P linear trend = 0.235 = 0.189
  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: 2311; n girls: 2429)
  3. bMultivariate analysis i.e. “full confounder adjustment model” (n boys: 2058; n girls: 2347)
  4. Adjustments (male: Grade, self-rated health, BMI; female: Grade, self-rated health, menarche)
  5. P: Chi2
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Asthma Research and Practice

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