Table 1.
Comparison of the maternal and neonatal characteristics between newborns with and without excessive weight loss
| Weight loss ≥10% N = 164 |
Weight loss < 10% N = 235 |
Test value or U value | Degree of freedom | p | |
|---|---|---|---|---|---|
| Maternal age, yearsa | 15,989 | NA | 0.004 | ||
| Minimum | 21 | 16 | |||
| 25 percentile | 31 | 28 | |||
| Median | 35 | 32 | |||
| 75 percentile | 37 | 37 | |||
| Maximum | 45 | 43 | |||
| Prepregnancy maternal weighta | 17,068 | NA | |||
| Minimum | 35 | 40 | |||
| 25 percentile | 50 | 48 | |||
| Median | 55 | 53 | |||
| 75 percentile | 63 | 60 | |||
| Maximum | 105 | 111 | |||
| Prepregnancy BMI, kg/m2a | 16,974 | NA | 0.043 | ||
| Minimum | 15.1 | 14.7 | |||
| 25 percentile | 19.8 | 19.2 | |||
| Median | 22.0 | 21.2 | |||
| 75 percentile | 25.2 | 24.0 | |||
| Maximum | 39.3 | 42.9 | |||
| Primiparityb | 85 (52%) | 82 (35%) | 10.7 | 1 | 0.001 |
| Infertility treatmentb | 30 (18.3%) | 21 (8.9%) | 6.8 | 1 | 0.009 |
| Maternal weight gain, kga | 20,860 | NA | 0.16 | ||
| Minimum | −4.0 | −8.4 | |||
| 25 percentile | 6.3 | 6.6 | |||
| Median | 8.7 | 9.5 | |||
| 75 percentile | 11.4 | 12.1 | |||
| Maximum | 24.5 | 25.6 | |||
| Hypertensionb | 14 (8.5%) | 14 (6.0%) | 0.63 | 1 | 0.43 |
| Diabetesb | 42 (26%) | 45 (19%) | 2.0 | 1 | 0.16 |
| Use of MgSO4 in laborb | 2 (1.2%) | 7 (3.0%) | 0.68 | 1 | 0.41 |
| Use of oxytocin in laborb | 52 (32%) | 59 (25%) | 1.8 | 1 | 0.18 |
| Gestational weeks at deliverya | 18,431 | NA | 0.46 | ||
| Minimum | 37.1 | 37.0 | |||
| 25 percentile | 38.7 | 38.4 | |||
| Median | 39.3 | 39.1 | |||
| 75 percentile | 39.9 | 40.0 | |||
| Maximum | 42.1 | 41.7 | |||
| Mode of deliveryb | 5.9 | 2 | 0.052 | ||
| Vaginal delivery | 106 (64.6%) | 178 (75.7%) | |||
| Intrapartum CS | 20 (12.2%) | 21 (8.9%) | |||
| Antepartum CS | 38 (23.2%) | 36 (15.3%) | |||
| Postpartum hemorrhagingb | 40 (24%) | 33 (14%) | 1.6 | 1 | 0.013 |
| Hemoglobin after delivery, g/dLa | 22,098 | NA | 0.013 | ||
| Minimum | 5.9 | 5.5 | |||
| 25 percentile | 9.3 | 9.6 | |||
| Median | 10.1 | 10.4 | |||
| 75 percentile | 11.0 | 11.2 | |||
| Maximum | 12.6 | 13.6 | |||
| Birth weight of infant < 2500 gb | 10 (6.1%) | 23 (9.8%) | 1.3 | 1 | 0.26 |
| Maleb | 80 (49%) | 113 (48%) | 0.0012 | 1 | 0.97 |
| Use of infant formula or water before weight loss ≥10%b | 22 (13%) | 33 (14%) | 0.001 | 1 | 0.98 |
| Neonatal jaundice requiring phototherapyb | 22 (13%) | 19 (8.1%) | 2.4 | 1 | 0.12 |
Abbreviations: BMI body mass index, CS Caesarean section, NA not applicable
a The Mann–Whitney U test was used
b The Pearson’s chi-squared test was used