Table 2.

Logistic regression model with odds ratios for asthma and atopic dermatitis according to gestational age among 1,760,821 live births.

		Asthma		Atopic dermatitis
		n = 9,349		n = 6,930
Gestational age (weeks)	n	Crude OR 95% CI)	Adjusted OR* (95% CI)	Crude OR (95% CI)	Adjusted OR* (95% CI)
23–31	9,512	3.63(3.12–4.22)	2.37 (2.01–2.79)	0.69 (0.47–1.02)	0.62 (0.42–0.92)
32–36	82,377	1.69 (1.56–1.82)	1.42 (1.30–1.54)	0.90 (0.79–1.01)	0.90 (0.80–1.02)
37–41	1,439,790	1.0 (ref)	1.0 (ref)	1.0 (ref)	1.0 (ref)
42–43	229,142	0.94 (0.89–1.01)	0.96 (0.90–1.02)	1.06 (0.99–1.13)	1.07 (1.00–1.15)

OR, odds ratio, CI, confidence interval

^*Adjusted for pregnancy disorders, caesarean section, maternal asthma and atopic dermatitis, parity, socio-demographic factors, and year of birth