. Author manuscript; available in PMC: 2018 Aug 1.

Published in final edited form as: J Pediatr Gastroenterol Nutr. 2017 Aug;65(2):225–231. doi: 10.1097/MPG.0000000000001539

Table 1a.

Duration of full breastfeeding and infections in the first 18 months of life in a sibling and full cohort analysis.

Endpoint	Model	Number of children with endpoint (%)	Odds ratio (95% CI) per month before introduction of complementary foods
Hospitalisation for any infection	Siblings matched (n=12,495)	1,012 (8.1)	0.975 (0.924–1.029)
Hospitalisation for any infection	Full cohort (n=56,993)	4,315 (7.6)	0.978 (0.963–0.994)
Any lower respiratory tract infection	Siblings matched (n=12,147)	1,674 (13.8)	0.994 (0.952–1.038)
Any lower respiratory tract infection	Full cohort (n=55,301)	7,124 (12.9)	0.990 (0.978–1.003)
Any gastro-enteritis	Siblings matched (n=11,739)	7,008 (59.7)	0.981 (0.950–1.013)
Any gastro-enteritis	Full cohort (n=53,226)	31,651 (59.5)	0.974 (0.965–0.983)
Upper respiratory tract infections (≥9)	Siblings matched (n=11,988)	2,581 (21.5)	0.982 (0.943–1.022)
Upper respiratory tract infections (≥9)	Full cohort (n=54,437)	11,236 (20.6)	0.968 (0.957–0.978)
Frequent infections (≥11)	Siblings matched (n=11,988)	2,312 (19.3)	0.973 (0.933–1.015)
Frequent infections (≥11)	Full cohort (n=54,437)	10,190 (18.7)	0.959 (0.949–0.970)