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

 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

 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

 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