TABLE 5

Univariate and multivariate analysis of exposures and severe asthma on the written questionnaire

Risk factorSevere wheeze n=669 (%)No severe wheeze n=3310 (%)Univariate analysisMultivariate analysis
OR (95% CI)p-valueOR (95% CI)p-value
Sex (male)287 (42.9)1444 (43.6)0.97 (0.82–1.15)0.730
Private school29 (4.3)179 (5.4)0.79 (0.53–1.18)0.256
Outdoor pollution260 (38.9)1074 (32.4)1.33 (1.12–1.59)0.0011.26 (1.06–1.51)0.010
Self-reported smoking (current)103 (15.4)245 (7.4)2.28 (1.78–2.92)<0.0012.29 (1.78–2.94)<0.001
Maternal smoking146 (21.8)836 (25.3)0.84 (0.68–1.02)0.079
Paternal smoking240 (35.9)1162 (35.1)1.01 (0.88–1.53)0.612
Wood used for heating or cooking49 (7.3)239 (7.2)1.02 (0.74–1.40)0.925
Exposure to pets483 (72.2)2228 (67.3)1.26 (1.05–1.52)0.0141.32 (1.09–1.61)0.005
Mother or father employed590 (88.2)2933 (88.6)0.89 (0.68–1.17)0.409
Home type – informal90 (13.5)327 (9.9)1.42 (1.10–1.82)0.0061.38 (1.05–1.81)0.019
Household assets (<7 items)363 (54.3)1612 (48.7)1.25 (1.06–1.48)0.0091.18 (0.99–1.42)0.072
Body mass index above 25 kg·m−2130 (19.4)617 (18.6)1.05 (0.85–1.30)0.638