Table 3

Effect of parental passive smoking on reported asthma and asthma symptoms

SymptomsPaternal smokingMaternal smokingPrevalence (%) of symptoms
OR95% CIOR95% CINo parent
smokes
One parent
smokes
Both parents
smoke
Asthma ever1.100.84 to 1.441.391.12 to 1.7420.626.428.7
(p < 0.01)(p < 0.01)
Wheeze ever1.381.11 to 1.721.461.19 to 1.7925.628.036.9
(p < 0.01)(p < 0.001)(p < 0.001)
Limitation of speech past year1.210.63 to 2.311.120.66 to 1.902.73.74.3
Wheeze past year0.800.61 to 1.161.150.86 to 1.5415.516.921.6
Wheeze with exercise past year1.040.76 to 1.441.381.05 to 1.8111.513.217.4
Night time cough past year0.930.74 to 1.201.050.85 to 1.2926.627.428.5
  • OR, odd ratio; CI, confidence interval: both by univariant regression.