Table 2 Exposure to maternal smoking during pregnancy or exposure to parental smoking when the infant was about 2 months old and sensitisation (IgE ⩾0.35 kUA/l) at 4 years of age
Any sensitisation*§Any inhalant†§Any food‡§
NnOR (95% CI)NnOR (95% CI)NnOR (95% CI)
No exposure in utero or ETS19173991.00 (Referent)19172731.00 (Referent)19172281.00 (Referent)
Exposure in utero but not to ETS98211.00 (0.61 to 1.66)98151.05 (0.59 to 1.87)98151.28 (0.72 to 2.26)
Exposure to ETS but not in utero305761.26 (0.95 to 1.68)304451.06 (0.75 to 1.50)305561.61 (1.16 to 2.24)
Exposure in utero and to ETS209541.30 (0.92 to 1.82)209361.21 (0.81 to 1.81)209321.24 (0.82 to 1.89)
  • N, total number in the group; n, number exposed.

  • *Any inhalant and/or any food allergen positive.

  • †Any inhalant (Phadiatop and at least one single allergen positive).

  • ‡Any food (fx5 and at least one single allergen positive).

  • §Adjusted for parental allergy and socioeconomic status.

  • ETS, environmental tobacco smoke.