Table 1. Relative Risk of Atopic Dermatitis Associated With Infant Characteristics

	Eczema, % (n/N)	RR (95% CI)	P Value
Sex
Male	30.3 (80/264)	1.19 (0.9–1.56)	.229
Female	25.0 (57/228)	—	—
Intrapartum antibiotics
Yes	28.9 (37/128)	1.03 (0.75–1.41)	.854
No	27.5 (100/364)	—	—
Birth order
First born	36.9 (80/217)	1.78 (1.33–2.38)	.0001
Second born or later	20.7 (57/275)	—	—
Maternal eczema (ever)^*
Yes	32.3 (21/65)	1.16 (0.77–1.74)	.495
No	32.2 (98/350)	—	—
Paternal eczema (ever)^*
Yes	41.4 (12/29)	1.55 (0.96–2.51)	.146
No	27.7 (106/382)	—	—
Sibling eczema (ever)^*
Yes	31.4 (28/80)	1.26 (0.85–1.86)	.344
No	27.3 (81/311)	—	—
Maternal asthma (ever)^*
Yes	27.9 (19/68)	0.99 (0.65–1.49)	.958
No	28.6 (99/346)	—	—
Paternal asthma (ever)^*
Yes	34.1 (14/41)	1.20 (0.75–1.93)	.477
No	28.1 (104/370)	—	—
Pets (cats/dogs)^*
Yes	29.0 (80/276)	1.10 (0.73–1.66)	.652
No	27.4 (26/95)	—	—
GBS status
Negative	63 (63/229)	1.32 (0.83–2.09)	.200
Positive	21.0 (17/81)	—	—
Smoking^*
No	29.5 (120/407)	1.65 (0.66–4.13)	.207
Yes	17.4 (4/23)	—	—
Infant feeding during first 3 months^*
Primarily breastfed	29.7 (85/286)	1.10 (0.79–1.53)	.579
Primarily formula fed	26.9 (39/145)	—	—
Gestational age (weeks)
≤40	27.2 (94/346)
>40	30.1 (43/143)	1.07 (0.78–1.46)	.678
Birth weight (grams)
<2500	57.1 (4/7)	4.23 (0.9–19.92)	.068
2500–4500	27.7 (132/477)	1.92 (0.96–3.83)	.064
>4500	12.5 (1/8)	—	—
Maternal education (years)^*
Did not attend college	22.5 (32/142)	0.70 (0.48–1.01)	.039
College degree or more	32.0 (97/303)	—	—