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Table 1 Comparison of the maternal and neonatal characteristics between newborns with and without excessive weight loss

From: Determinants of excessive weight loss in breastfed full-term newborns at a baby-friendly hospital: a retrospective cohort study

 Weight loss ≥10%
N = 164
Weight loss < 10%
N = 235
Test value or U valueDegree of freedomp
Maternal age, yearsa  15,989NA0.004
 Minimum2116   
 25 percentile3128   
 Median3532   
 75 percentile3737   
 Maximum4543   
Prepregnancy maternal weighta  17,068NA 
 Minimum3540   
 25 percentile5048   
 Median5553   
 75 percentile6360   
 Maximum105111   
Prepregnancy BMI, kg/m2a  16,974NA0.043
 Minimum15.114.7   
 25 percentile19.819.2   
 Median22.021.2   
 75 percentile25.224.0   
 Maximum39.342.9   
Primiparityb85 (52%)82 (35%)10.710.001
Infertility treatmentb30 (18.3%)21 (8.9%)6.810.009
Maternal weight gain, kga  20,860NA0.16
 Minimum−4.0−8.4   
 25 percentile6.36.6   
 Median8.79.5   
 75 percentile11.412.1   
 Maximum24.525.6   
Hypertensionb14 (8.5%)14 (6.0%)0.6310.43
Diabetesb42 (26%)45 (19%)2.010.16
Use of MgSO4 in laborb2 (1.2%)7 (3.0%)0.6810.41
Use of oxytocin in laborb52 (32%)59 (25%)1.810.18
Gestational weeks at deliverya  18,431NA0.46
 Minimum37.137.0   
 25 percentile38.738.4   
 Median39.339.1   
 75 percentile39.940.0   
 Maximum42.141.7   
Mode of deliveryb  5.920.052
 Vaginal delivery106 (64.6%)178 (75.7%)   
 Intrapartum CS20 (12.2%)21 (8.9%)   
 Antepartum CS38 (23.2%)36 (15.3%)   
Postpartum hemorrhagingb40 (24%)33 (14%)1.610.013
Hemoglobin after delivery, g/dLa  22,098NA0.013
 Minimum5.95.5   
 25 percentile9.39.6   
 Median10.110.4   
 75 percentile11.011.2   
 Maximum12.613.6   
Birth weight of infant < 2500 gb10 (6.1%)23 (9.8%)1.310.26
Maleb80 (49%)113 (48%)0.001210.97
Use of infant formula or water before weight loss ≥10%b22 (13%)33 (14%)0.00110.98
Neonatal jaundice requiring phototherapyb22 (13%)19 (8.1%)2.410.12
  1. Abbreviations: BMI body mass index, CS Caesarean section, NA not applicable
  2. a The Mann–Whitney U test was used
  3. b The Pearson’s chi-squared test was used