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Table 3 Impact of prepregnancy obesity on pregnancy and neonatal outcomes (n = 2009)

From: Socioeconomic disparities in prepregnancy BMI and impact on maternal and neonatal outcomes and postpartum weight retention: the EFHL longitudinal birth cohort study

Outcome Frequency (%) Adjusted ORa(95% CI) p-value (2-sided)
Obstetric Complication:
Hyperglycaemia    
  Normal weight 65 (8.0%) Reference  
  Underweight 5 (3.7%) 0.532 (0.207 – 1.371) 0.192
  Overweight 35 (9.7%) 1.210 (0.754 – 1.940) 0.430
  Obesity 38 (11.8%) 1.464 (0.921 – 2.328) 0.107
  Missingb 382   Trendc (0.024*)
Gestational diabetes    
  Normal weight 21 (2.4%) Reference  
  Underweight 0 (0%)
  Overweight 7 (2.0%) 1.040 (0.396 – 2.732) 0.937
  Obesity 11 (3.6%) 2.327 (1.037 – 5.223) 0.041*
  Missing 337
Preeclampsia    
  Normal weight 25 (3.1%) Reference  
  Underweight 0 (0%)
  Overweight 11 (3.3%) 1.184 (0.559 – 2.505) 0.660
  Obesity 29 (9.8%) 3.143 (1.694 – 5.830) < 0.001*
  Missing 430   
Cesarean delivery    
  Normal weight 238 (23.0%) Reference  
  Underweight 38 (23.0%) 0.950 (0.588 – 1.536) 0.834
  Overweight 146 (34.4%) 1.802 (1.349 – 2.409) <0.001*
  Obesity 127 (35.9%) 2.229 (1.646 – 3.018) <0.001*
  Missing 32   Trend (< 0.001*)
Neonatal Complication:
Intensive/Special care admission    
  Normal weight 117 (11.3%) Reference  
  Underweight 15 (9.1%) 0.590 (0.296 – 1.176) 0.134
  Overweight 67 (15.9%) 1.339 (0.921 – 1.947) 0.126
  Obesity 73 (20.6%) 1.839 (1.269 – 2.665) 0.001*
  Missing 36   Trend (<0.001*)
Fetal distress    
  Normal weight 62 (6.7%) Reference  
  Underweight 17 (11.3%) 2.178 (1.147 – 4.133) 0.017*
  Overweight 24 (6.0%) 1.222 (0.706 – 2.113) 0.474
  Obesity 33 (9.6%) 1.870 (1.103 – 3.169) 0.020*
  Missing 191   Trend (0.143)
Jaundice    
  Normal weight 39 (4.8%) Reference  
  Underweight 11 (8.2%) 1.782 (0.821 – 3.866) 0.144
  Overweight 30 (8.4%) 1.762 (1.017 – 3.053) 0.044*
  Obesity 22 (6.8%) 1.592 (0.882 – 2.872) 0.123
  Missing 382   Trend (0.163)
Respiratory distress    
  Normal weight 38 (4.7%) Reference  
  Underweight 6 (4.5%) 0.879 (0.332 – 2.330) 0.796
  Overweight 20 (5.6%) 1.275 (0.700 – 2.322) 0.427
  Obesity 22 (6.8%) 1.294 (0.700 – 2.394) 0.411
  Missing 382   Trend (0.288)
Congenital anomaly    
  Normal weight 62 (7.3%) Reference  
  Underweight 10 (7.3%) 1.362 (0.662 – 2.804) 0.401
  Overweight 26 (7.1%) 0.966 (0.559 – 1.668) 0.901
  Obesity 25 (7.9%) 1.179 (0.692 – 2.011) 0.544
  Missing 343   Trend (0.868)
Macrosomia (birthweight >4kg)    
  Normal weight 140 (13.6%) Reference  
  Underweight 10 (6.2%) 0.389 (0.176 – 0.859) 0.019*
  Overweight 70 (16.5%) 1.334 (0.945 – 1.884) 0.101
  Obesity 93 (26.3%) 2.262 (1.619 – 3.160) < 0.001*
  Missing 43   Trend (< 0.001*)
Resuscitation    
  Normal weight 253 (26.1%) Reference  
  Underweight 32 (20.9%) 0.675 (0.417 – 1.091) 0.108
  Overweight 112 (27.8%) 1.186 (0.887 – 1.587) 0.248
  Obesity 118 (34.5%) 1.499 (1.109 – 2.024) 0.009*
  Missing 143   Trend (0.001*)
  1. *Significant at the 0.05 level.
  2. aAdjusted for maternal age, employment (categorical) and education, marital status (categorical), paternal employment (categorical) and education, household ownership, number of children under 16, alcohol intake and smoking status during pregnancy, maternal non-medical drug use, primiparity, pre-existing hypertension, and year of recruitment.
  3. bDue to differences in hospital perinatal data collection among participating hospitals, some maternal morbidities have more missing data.
  4. c p-value for linear trend of adjusted ORs.