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Table 3 Proportion and odds ratio (OR) with 95% confidence interval (CI) for mothers who did not initiate exclusive breastfeeding (EBF) at 1 month (N = 1508)

From: A relationship between a level of hemoglobin after delivery and exclusive breastfeeding initiation at a baby friendly hospital in Japan

  Logistic regression models  
Crude OR (95% CI) P* Multivariate stepwise models  
Adjusted OR 95% CI P*
Lower Upper
Maternal age 1.05 (1.03–1.08) <0.001 1.06 1.03 1.08 <0.001
Prepregnancy BMI, kg/m2   0.442     0.941
 <18.5 0.90 (0.69–1.18)   1.01 0.77 1.33  
 18.5–24.9 1   1  
Nulliparity 1.66 (1.31–2.11) <0.001 1.73 1.34 2.24 <0.001
Caesarean section 2.13 (1.61–2.83) <0.001 1.66 1.22 2.26 0.001
Pregnancy induced hypertension 1.96 (1.16– 3.31) 0.012 1.29 0.74 2.27 0.373
Gestational week at delivery 0.85 (0.77–0.95) 0.002 0.84 0.75 0.94 0.002
postpartum obstetrical hemorrhage >500 ml 1.34 (1.07–1.68) 0.011 1.01 0.77 1.31 0.973
Hemoglobin level   <0.001     0.025
 <9 1.85 (1.31–2.62)   1.63 1.10 2.42  
 9–10.9 1.42 (1.11–1.82)   1.35 1.04 1.75  
 11≤ 1   1  
Birthweight of infant <2500 g 2.39 (1.49–3.85) <0.001 1.63 0.97 2.74 0.063
Immediate separation after delivery 1.64 (1.08–2.48) 0.020 1.44 0.93 2.22 0.100
  1. *P for the category or trend p