Table 3 Odds ratios for gestational age and birth weights by paternal age

Gestational age < 32 weeks

 Crude OR

0.567 (0.285, 1.126)

Reference

0.583 (0.281, 1.210)

0.614 (0.250, 1.509)

 Adjusted OR

0.602 (0.263, 1.377)

Reference

0.676 (0.285, 1.603)

0.971 (0.298, 3.160)

Gestational age < 37 weeks

 Crude OR

1.123 (0.899, 1.402)

Reference

0.926 (0.740, 1.160)

0.991 (0.742, 1.322)

 Adjusted OR

1.157 (0.887, 1.510)

Reference

0.905 (0.700, 1.171)

0.980 (0.676, 1.419)

Very low birthweight (< 1500 g)

 Crude OR

0.470 (0.179, 1.237)

Reference

0.427 (0.159, 1.147)

0.399 (0.126, 1.261)

 Adjusted OR

0.373 (0.117, 1.191)

Reference

0.503 (0.164, 1.544)

0.459 (0.114, 1.848)

Low birthweight (< 2500 g)

 Crude OR

1.038 (0.776, 1.389)

Reference

1.004 (0.739, 1.366)

0.722 (0.511, 1.019)

 Adjusted OR

0.974 (0.690, 1.375)

Reference

1.076 (0.755, 1.533)

0.952 (0.596, 1.521)

High birthweight (> 4000 g)

 Crude OR

0.881 (0.720, 1.077)

Reference

1.061 (0.847, 1.329)

1.141 (0.850, 1.530)

 Adjusted OR

1.013 (0.792, 1.294)

Reference

1.040 (0.803, 1.348)

1.141 (0.784, 1.660)

Very small for gestational age (< 3rd percentile)

 Crude OR

1.075 (0.701, 1.648)

Reference

1.375 (0.835, 2.262)

1.006 (0.574, 1.764)

 Adjusted OR

1.013 (0.858, 1.165)

Reference

1.304 (0.739, 2.300)

1.101 (0.513, 2.362)

Small for gestational age (< 10th percentile)

 Crude OR

1.002 (0.760, 1.322)

Reference

1.013 (0.753, 1.364)

1.180 (0.795, 1.749)

 Adjusted OR

1.069 (0.760, 1.505)

Reference

1.107 (0.791, 1.550)

1.409 (0.859, 2.312)

Large for gestational age (> 90th percentile)

 Crude OR

1.184 (1.001, 1.400)

Reference

0.976 (0.823, 1.157)

1.013 (0.817, 1.257)

 Adjusted OR

1.220 (0.995, 1.495)

Reference

1.003 (0.826, 1.218)

1.068 (0.811, 1.407)

Very large of gestational age (> 97th percentile)

 Crude OR

0.868 (0.709, 1.062)

Reference

1.033 (0.823, 1.295)

1.252 (0.922, 1.699)

 Adjusted OR

0.928 (0.724, 1.188)

Reference

1.054 (0.812, 1.368)

1.379 (0.934, 2.036)