Table 5 Exposure to parental cigarette smoking at different ages and sensitisation (IgE ⩾0.35 kUA/l) to any inhalant and/or food allergen at 4 years of age
ETS exposureNnCrude model OR (95% CI)Adjusted for parental allergy and socioeconomic status OR (95% CI)Additional adjustment for exposure in utero OR (95% CI)
Never18784001.00 (Referent)1.00 (Referent)1.00 (Referent)
Only at 2 months113351.66 (1.10 to 2.51)1.68 (1.11 to 2.55)1.63 (1.07 to 2.49)
At 2 months, 1 and/or 2 y (2 out of 3) or at 1 or 2 years only218390.81 (0.56 to 1.16)0.77 (0.53 to 1.12)0.73 (0.49 to 1.08)
Exposed at 2 months, 1 and 2 y308721.13 (0.85 to 1.50)1.11 (0.82 to 1.49)1.03 (0.73 to 1.44)
  • ETS, environmental tobacco smoke; N, total number in the group; n, number exposed.