Table 1

HRs (95% CIs) of possible factors involved in the incidence of atopic dermatitis until 3 years old

FactorsCrude HR (95% CI)Adjusted HR (95% CI)
Short versus long sunshine duration1.03 (0.99 to 1.08)
Low versus high humidity1.06 (1.01 to 1.11)0.99 (0.95 to 1.04)
Birth month between January and March1.02 (0.95 to 1.09)1.02 (0.95 to 1.09)
Birth month between April and JuneReferenceReference
Birth month between July and September1.06 (0.99 to 1.13)1.05 (0.98 to 1.13)
Birth month between October and December1.20 (1.12 to 1.28)1.20 (1.12 to 1.29)
Father’s history of allergy1.21 (1.16 to 1.28)1.18 (1.12 to 1.24)
Mother’s history of allergy1.70 (1.62 to 1.78)1.69 (1.61 to 1.77)