Table 3 Adjusted odds ratios (95%CI) for the relationship of pre-pregnancy body mass index with LGA and preterm, by maternal age

Overall^a

0.53 (0.46,0.62)

Ref

1.78 (1.60,1.98)

0.76 (0.63,0.93)

Ref

1.52 (1.30,1.77)

 < 30

0.49 (0.39,0.62)

Ref

1.56 (1.28,1.90)

0.70 (0.51,0.97)

Ref

1.45 (1.08,1.93)

 30-34

0.47 (0.37,0.60)

Ref

1.83 (1.55,2.15)

0.79 (0.59,1.07)

Ref

1.56 (1.23,1.98)

 35-37

0.84 (0.59,1.20)

Ref

1.98 (1.52,2.57)

0.88 (0.54,1.43)

Ref

1.54 (1.06,2.24)

 ≥ 38

0.62 (0.32,1.21)

Ref

2.01 (1.42,2.84)

0.58 (0.23,1.47)

Ref

1.48 (1.04,2.32)