Combining breastfeeding and work: findings from the Epifane population-based birth cohort

Table 4 Association between women and pregnancy characteristics and continuing BF after return to work (logistic regressions; n = 1487)

	Univariate models		Final multivariate model
	OR	95%CI	OR	95%CI
Age
18–24 y	0.63	0.39–1.02
25–29 y	0.74	0.57–0.98
30–34 y	1
≥ 35 y	1.01	0.74–1.39
Birthplace
Abroad	2.28	1.55–3.36	2.24	1.49–3.36
France	1		1
Matrimonial status
Married	1
Unmarried	0.71	0.57–0.90
Education
Elementary / middle school	0.74	0.49–1.12	0.91	0.59–1.42
High school	0.57	0.41–0.79	0.74	0.52–1.04
University	1		1*
Occupation before pregnancy
Farmers, artisans, merchants	1.82	0.96–3.46	2.23	1.11–4.47
Managers	1		1
Intermediate employees	0.52	0.40–0.68	0.58	0.44–0.76
Manual workers	0.43	0.25–0.73	0.48	0.27–0.88
Body weight status before pregnancy
Thin	1.36	0.86–2.15
Normal weight	1
Overweight	1.05	0.77–1.42
Obese	0.87	0.54–1.39
Smoking before pregnancy
No	1		1
Quit during pregnancy	0.57	0.41–0.78	0.61	0.44–0.84
Before & during pregnancy	0.38	0.25–0.57	0.49	0.32–0.76
Parity
1	1
2	1.18	0.92–1.51
≥ 3	1.23	0.85–1.78
Mode of delivery
Vaginal	1		1
Cesarean	0.72	0.52–0.98	0.69	0.50–0.96
Gestational age
≥ 37 weeks	1
33–36 weeks	0.79	0.42–1.48
Birthweight
≥ 2500 g	1
< 2500 g	0.54	0.27–1.05

*Covariate kept in the final multivariate model, since removing it modified the OR of “Workers” by more than 10%. CI confidence interval, OR odds ratio

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