Table 3.

Associations between breastfeeding duration with hospitalisation for ‘all infectious causes’ and for ‘respiratory tract infections’, with unadjusted and adjusted* odds ratios

	Hospitalised (%)	IC (UNADJ. OR, 95% CI)	IC (ADJ. OR, 95% CI)	Hospitalised (%)	RTI (UNADJ. OR, 95% CI)	RTI (ADJ. OR, 95% CI)
Breastfeeding duration
Never breastfed (n = 1874)	8	1	1	5	1	1
		1.1 (0.71–1.7)	1.16 (0.75–1.8)		0.81 (0.48–1.36)	0.89 (0.53–1.5)
<1 week (n = 1083)	9	P = 0.664	P = 0.504	6	P = 0.425	P = 0.649
		0.89 (0.6–1.31)	0.92 (0.62–1.38)		0.83 (0.51–1.36)	0.93 (0.57–1.54)
1–6 weeks (n = 1303)	8	P = 0.551	P = 0.693	5	P = 0.46	P = 0.779
		0.79 (0.51–1.24)	0.79 (0.5–1.24)		0.69 (0.39–1.2)	0.74 (0.42–1.31)
6 weeks to 3 months (n = 873)	7	P = 0.304	P = 0.301	4	P = 0.188	P = 0.306
		0.65 (0.43–1.0)	0.64 (0.42–0.99)		0.57 (0.34–0.95)	0.59 (0.36–1.0)
3–6 months (n = 1301)	5	P = 0.048	P = 0.044	3	P = 0.033	P = 0.048
		0.81 (0.51–1.29)	0.79 (0.49–1.26)		0.61 (0.35–1.09)	0.63 (0.36–1.13)
<6 weeks EBF (n = 777)	6	P = 0.374	P = 0.313	4	P = 0.094	P = 0.121
		0.41 (0.21–0.80)	0.42 (0.22–0.81)		0.50 (0.24–1.06)	0.53 (0.25–1.13)
≥6 weeks EBF (n = 524)	3	P = 0.009	P = 0.01	2	P = 0.07	P = 0.099
		0.59 (0.42–0.84)	0.58 (0.41–0.82)		0.45 (0.29–0.71)	0.47 (0.3–0.73)
6 months or more (n = 3379)	5	P = 0.003	P = 0.002	3	P = 0.001	P = 0.001
		0.75 (0.5–1.13)	0.72 (0.48–1.08)		0.58 (0.34–0.98)	0.59 (0.35–1.01)
<6 weeks EBF (n = 1295)	7	P = 0.174	P = 0.11	4	P = 0.042	P = 0.053
		0.48 (0.33–0.72)	0.48 (0.32–0.72)		0.37 (0.22–0.61)	0.38 (0.23–0.63)
≥6 weeks EBF (n = 2084)	5	P < 0.001	P < 0.001	3	P < 0.001	P < 0.001

CI, confidence interval; UNADJ. OR, unadjusted odds ratio; ADJ. OR, adjusted odds ratio; RTI, respiratory tract infections; EBF, exclusive breastfeeding.

^* Adjusted for birth order, special care after delivery, age mother left full‐time education, gestational age and infant age at survey stage 3.