Breastfeeding Duration: A Survival Analysis—Data from a Regional Immunization Survey

Table 2

Maternal characteristics and median duration of any and exclusive BF (in months) with 95% confidence interval (CI), 𝑃 values.

	% (𝑛)	Any breastfeeding			Exclusive breastfeeding
		Median duration	95% CI	𝑃 value	Median duration	95% CI	𝑃 value
Native nationality
Belgian	71.8 (377)	3.5	3.1–3.8	<0.001	3.0	2.7–3.3	<0.001
Foreign	28.2 (148)	6.0	5.4–6.6		4.0	3.3–4.7
Awareness WHO recommendation
Yes	27.5 (132)	6.0	5.2–6.8	<0.001	4.0	3.5–4.5	<0.001
No	72.5 (348)	3.5	3.1–3.9		3.0	2.6–3.4
Prenatal maternal intention
Yes	64.5 (300)	4.5	3.9–5.1	0.006	3.0	2.7–3.3	0.03
No	35.5 (165)	3.0	2.4–3.6		2.0	1.5–2.5
Age (years)
16–29	39.9 (205)	3.5	3.0–4.0	0.05	3.0	2.4–3.6	0.3
30–47	60.1 (309)	4.5	3.8–5.1		3.0	2.6–3.4
Education level
≤first 3 years of secondary school	34.6 (178)	3.0	2.5–3.5	0.09*	3.0	2.5–3.5	0.2*
Last 3 years of secondary school	23.3 (120)	4.0	2.3–5.7		3.0	2.3–3.7
Higher education	42.1 (217)	4.5	4.0–5.0		3.0	2.6–3.3
Age of infant when mother returned to work
≤3 months	21.0 (109)	3.0	2.5–3.5	<0.001	2.0	1.5–2.5	<0.001
4 months and more	45.6 (236)	4.5	4.0–5.0		4.0	4.0–4.3
Unemployed	33.4 (173)	4.0	2.7–5.3		3.0	2.0–4.0

∗Breslow test ≤ 0.05.