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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