Table 4 Breastfeeding duration in months
From: Factors associated with duration of breastfeeding in Spain: a cohort study
Factor | Mean (95% CI) | Median (95% CI) |
|---|---|---|
Maternal age (selected ages) | ||
20 years | 5.05 (4.09–6.00) | 2.63 (1.97–3.29) |
25 years | 5.37 (4.72–6.03) | 2.90 (2.38–3.41) |
30 years | 5.70 (5.29–6.11) | 3.18 (2.80–3.56) |
35 years | 6.03 (5.69–6.36) | 3.50 (3.15–3.85) |
Maternal educational level | ||
Primary studies (ref.) | 5.03 (4.30, 5.77) | 2.78 (2.22, 3.33) |
Secondary studies | 5.82 (4.87, 6.76) | 3.57 (2.67, 4.46) |
Foundation degree | 4.95 (4.34, 5.56) | 2.74 (2.29, 3.20) |
University studies | 7.27 (6.72, 7.81) | 4.28 (3.66, 4.90) |
Smoking in pregnancy | ||
No (ref.) | 6.21 (5.86, 6.56) | 3.62 (3.25, 3.99) |
Yes | 4.15 (3.23, 5.08) | 2.14 (1.61, 2.66) |
Duration of pregnancy | ||
≥ 37 weeks (ref.) | 5.97 (5.62, 6.31) | 3.46 (3.10, 3.81) |
34–36 weeks | 5.91 (4.26, 7.56) | 3.37 (1.88, 4.85) |
< 34 weeks | 4.96 (2.38, 7.54) | 3.13 (1.01, 5.25) |
Twin pregnancy | ||
No (ref.) | 6.02 (5.69, 6.36) | 3.51 (3.15, 3.87) |
Yes | 4.16 (2.51, 5.80) | 2.00 (1.13, 2.87) |
Newborn weight | ||
< 2500 g | 5.01 (3.71, 6.30) | 2.68 (1.74, 3.63) |
2500, 4000 g | 6.00 (5.63, 6.36) | 3.49 (3.11, 3.86) |
> 4000 g | 6.49 (5.30, 7.67) | 3.77 (2.61, 4.92) |