Table 4

Effect of maternal smoking4-150 on asthmatic symptoms among the children at age 1, 2, and 4 years—logistic regression analysis; values are adjusted OR (95% CI)

1 year2 years4 years
Asthma
 Total2.5 (1.7 to 3.7)4-159 2.2 (1.5 to 3.4)4-159 1.2 (0.3 to 2.7)
 Atopic1.3 (0.6 to 2.2)1.1 (0.5 to 2.0)1.0 (0.3 to 1.8)
 Non-atopic2.0 (1.3 to 3.0)4-152 1.6 (0.9 to 2.4)1.4 (0.6 to 2.1)
Any atopy1.5 (1.1 to 2.0)4-152 1.3 (1.0 to 1.9)4-151 1.1 (0.6 to 1.6)
  • 4-150 As at each follow up.

  • 4-151 p<0.05,

  • 4-152 p<0.001,

  • 4-159 p<0.001.

  • Atopic asthma: asthma with positive skin prick test. Non-atopic asthma: asthma with negative skin prick test.