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Table 3 Adjusted OR for birth weight classified by jointed pre-pregnancy BMI and GWG

From: Association among pre-pregnancy body mass index, gestational weight gain and neonatal birth weight: a prospective cohort study in China

Pre-BMI/GWG N(%) SGA LGA
OR a 95%CI OR a 95%CI
Underweight
 Insufficient 145 (4.04) 2.961 b 1.491–5.881 0.576 0.176–1.884
 adequate 239 (6.67) Ref.   Ref.  
 Excessive 124 (3.46) 0.886 0.354–2.217 1.730 0.690–4.336
Normal weight
 Insufficient 695 (19.39) 1.236 c 1.036–1.828 0.988 0.699–1.397
 adequate 1078 (30.07) Ref.   Ref.  
 Excessive 781 (21.79) 0.614 c 0.388–0.972 1.623* 1.201–2.194
Overweight/Obesity
 Insufficient 45 (1.25) 6.672 c 1.386–32.118 0.518 0.144–1.859
 adequate 172 (4.80) Ref.   Ref.  
 Excessive 306 (8.53) 1.220 0.274–5.420 2.287 c 1.318–3.969
  1. a Adjusted for maternal age, occupation, gravidity, parity, GDM and gestational hypertension; b P < 0.001; c P < 0.05