Table 4.

Adjusted associations between breastfeeding status and longitudinal patterns of skin rash in childhood (n = 1,377)

	Skin rash
	(ref: never)
	Decreasing throughout childhood	Increasing throughout childhood	Strong peak in early childhood	High throughout childhood	p
Any breastfeeding					.5
Never breastfed	1 [Ref]	1 [Ref]	1 [Ref]	1 [Ref]
Ever breastfed	0.81 [0.54, 1.20]	0.96 [0.65, 1.42]	1.70 [0.81, 3.55]	1.04 [0.66, 1.64]
Any breastfeeding duration (months)	1.00 [0.95, 1.05]	0.99 [0.94, 1.04]	1.03 [0.96, 1.11]	0.97 [0.91, 1.02]	.7
Any breastfeeding duration					.5
<1 month	1 [Ref]	1 [Ref]	1 [Ref]	1 [Ref]
1 to <4 months	0.99 [0.65, 1.53]	0.96 [0.63, 1.47]	2.22 [1.06, 4.65]	1.24 [0.78, 1.98]
≥4 months	0.95 [0.61, 1.49]	0.98 [0.64, 1.50]	1.76 [0.81, 3.80]	0.82 [0.49, 1.36]
Predominant breastfeeding					.8
Never breastfed	1 [Ref]	1 [Ref]	1 [Ref]	1 [Ref]
Ever breastfed	0.89 [0.62, 1.29]	0.91 [0.64, 1.30]	1.37 [0.73, 2.58]	1.07 [0.70, 1.63]
Predominant breastfeeding duration (months)	0.96 [0.89, 1.03]	1.00 [0.94, 1.07]	0.85 [0.71, 1.01]	0.99 [0.91, 1.07]	.3
Predominant breastfeeding duration					.8
<1 month	1 [Ref]	1 [Ref]	1 [Ref]	1 [Ref]
1 to <4 months	1.03 [0.70, 1.51]	0.89 [0.61, 1.28]	1.31 [0.71, 2.41]	1.21 [0.80, 1.84]
≥4 months	1.13 [0.66, 1.92]	1.23 [0.77, 1.99]	1.38 [0.63, 3.01]	0.91 [0.50, 1.66]

Note. Data are multinomial odds ratio [95% confidence interval], adjusted for centre, family history of allergy, parity, smoking status during pregnancy, maternal education level, maternal age at birth, family monthly income, sex, gestational age, caesarean section, age at first attendance to collective care arrangement, and age at introduction of solid food. Separate models were conducted for each breastfeeding exposure.