Skip to main content

Table 1 Sociodemographic characteristics of women in the different BMI groups

From: Effect of Body Mass Index on pregnancy outcomes in nulliparous women delivering singleton babies

Characteristics Underweight
BMI < 20
n = 2842
Normal
BMI = 20–24.9
n = 14076
Overweight
BMI = 25–29.9
n = 5308
Obese
BMI = 30–34.9
n = 1858
Morbidly Obese
BMI > 35
n = 157
Age at delivery (years) 24.8 (5.2)* 26.4(5.2) 26.8(5.2) 26.8(5.1) 28.3(5.3)*
Height (cm) 163.0(6.5) 162.5(6.3) 162.2(6.4) 162.2(6.4) 162.4(6.0)
Weight (Kg) 50.1(4.6) 59.2(5.7) 70.9(6.7) 87.3(9.5) 114.1(11.2)
BMI (Kg/m2) 18.8 (0.9) 22.4(1.3) 26.9(1.4) 33.2(2.5) 43.3(3.7)
Booking week 10.7(2.6) 10.8(2.6) 10.6(2.7) 10.2(2.7) 9.7(2.8)
Married or cohabiting 2201(77.4%)* 11848(84.2%) 4449(83.8%) 1522(81.9%) 125(79.6%)*
Husband/partner's social class I/II 662(23.3%)* 3771(26.8%) 1227(23.1%)* 358(19.3%)* 24(15.3%)*
Smoking 1208(42.5%)* 4832(34.3%) 1691(31.9%)* 568(30.6%)* 32(20.4%)*
Type I Diabetes 0(0%) 27(0.2%) 40(0.8%)* 5 (0.3%) 3(1.9%)*
  1. Values expressed as mean (SD) median (IQR) or number (per cent)
  2. * P value less than 0.05