Variable | OR | SE | 95% CI | p | OR | SE | 95% CI | p |
---|---|---|---|---|---|---|---|---|
Model 1. Cesarean section indicator | Model 2. Exclusive breast milk feeding indicator | |||||||
Log likelihood = − 325.29, χ2 = 69.07 (10 df), p < 0.00001, No. of obs = 622 | Log likelihood = −498.52, χ2 = 79.69 (10 df), p < 0.00001, No. of obs = 1103 | |||||||
Maternal age (years) | ||||||||
18–33 | 1.00a | 1.00a | ||||||
34–55 | 1.42 | 0.30 | 0.93–2.17 | 0.100 | 0.60 | 0.10 | 0.43–0.83 | 0.002 |
Gestational age at delivery (weeks) | ||||||||
37–38 | 1.00a | 1.00a | ||||||
39–41 | 0.59 | 0.13 | 0.38–0.91 | 0.019 | 1.60 | 0.29 | 1.12–2.29 | 0.010 |
Maternal nationality | ||||||||
Italian | 1.00a | NAb | ||||||
Other | 0.50 | 0.21 | 0.22–1.13 | 0.097 | NAb | |||
Prenatal testsc | ||||||||
No | NAb | 1.00a | ||||||
Yes | NAb | 1.87 | 0.33 | 1.32–2.65 | < 0.001 | |||
IUGRd | ||||||||
No | 1.00a | 1.00a | ||||||
Yes | 2.00 | 0.85 | 0.87–4.63 | 0.103 | 0.46 | 0.24 | 0.16–1.29 | 0.140 |
Tobacco use during pregnancy | ||||||||
No | 1.00a | 1.00a | ||||||
Yes | 2.42 | 0.86 | 1.20–4.87 | 0.013 | 0.61 | 0.20 | 0.31–1.18 | 0.141 |
Pregnancy weight gain (Kg) | ||||||||
< 10 | NAb | 1.00a | ||||||
> 10 | NAb | 1.26 | 0.20 | 0.92 - 1.74 | 0.152 | |||
Maternal comorbiditiese | ||||||||
No | 1.00a | NAb | ||||||
Yes | 1.51 | 0.36 | 0.94–2.43 | 0.086 | NAb | |||
Previous cesarean sections | ||||||||
No | NAb | 1.00a | ||||||
Yes | NAb | 1.83 | 0.49 | 1.08–3.11 | 0.025 | |||
Rupture of membranesf | ||||||||
SROM | 1.47 | 0.36 | 0.90–2.38 | 0.123 | 1.00a | |||
PROM | 1.00a | Backward elimination | ||||||
AROM | 2.01 | 0.46 | 1.28–3.15 | 0.002 | 0.70 | 0.12 | 0.51–0.97 | 0.035 |
Amniotic fluid | ||||||||
Clear | 1.00a | NAb | ||||||
Meconium-stained | 3.08 | 0.77 | 1.89–5.01 | < 0.001 | NAb | |||
Amniotic fluid volume | ||||||||
Normal | NAb | 1.00a | ||||||
Oligohydramnios / polyhydramnios | NAb | 0.56 | 0.22 | 0.26–1.19 | 0.134 | |||
Birth weight (g) | ||||||||
< 2500 | Backward elimination | 0.26 | 0.10 | 0.12–0.56 | 0.001 | |||
2500–4000 | 1.00a | 1.00a | ||||||
> 4000 | 6.36 | 3.45 | 2.20–18.40 | 0.001 | 2.57 | 1.63 | 0.74–8.89 | 0.135 |
Type of delivery | ||||||||
Vaginal | NAb | 1.00a | ||||||
Cesarean section | NAb | 0.39 | 0.78 | 0.26 - 0.57 | < 0.001 |