Table 4.

Adjusted OR and PAF for breastfeeding duration and hospitalisation for infectious causes

Duration	% of infants breastfed	% of cases breastfed	Hospitalisation adjusted OR* (95% CI)	P‐value	PAF†	Hospitalisation adjusted OR* (95% CI)	P‐value	PAF†
Never breastfed	19	22	2.07 (1.38–3.11)	<0.001	11%a	1.55 (1.01–2.37)	0.046	8%d
BF <6 weeks	24	30	2.12 (1.48–3.04)	<0.001	16%b	1.58 (1.09–2.31)	0.017	11%e
BF 6 weeks to 3 months	9	10	1.64 (1.05–2.57)	0.029	4%c	1.23 (0.77–1.95)	0.385	—
BF 3–6 months	13	10	1.34 (0.88–2.03)	0.167	—	1	—	reference
BF ≥6 months (with EBF <6 weeks)	13	13	1.49 (0.99–2.23)	0.053	—	1.11 (0.73–1.70)	0.62	—
BF ≥6 months (with EBF ≥6 weeks)	21	15	1	—	reference	0.75 (0.49–1.13)	0.167	—

OR, odds ratio; PFA, population attributable fraction; CI, confidence interval; BF, breastfeeding; EBF, exclusive breastfeeding.

^* Models from Table 2 have been refitted with different reference groups.

^† Overall PAF for breastfeeding less than 3 months (a + b + c) = 31%; overall PAF for breastfeeding less than 6 weeks (d + e) = 19%. PAFs only calculated where the OR is significant (P‐value <0.05).

^a PAF = [0.22 × (1.07/2.07)] =11%.

^b PAF = [0.3 × (1.12/2.12)] =16%.

^c PAF = [0.1 × (0.64/1.64)] =4%.

^d PAF = [0.22 × (0.55/1.55)] =8%.

^e PAF = [0.3 × (0.58/1.58)] =11%.