| S+B(131) | S(134) | OR(95% CI) | P | |
| B. W.(g) G. A (wks) Age study (hrs) Death | 882 ± 249 26.5 ± 2.2 2.0 ± 1.5 17/131(13%) | 935 ± 283 26.8 ± 2.2 1.8 ± 1.6 22/134(16%) | 0.76(0.38, 1.51) | 0.81 0.91 0.85 0.54 |
| BPD | 38/131(29%) | 67/134(50%) | 0.49(0.29, 0.81) | 0.008 |
| BPD or death | 55/131(42%) | 89/134(66%) | 0.45(0.27, 0.73) | 0.001 |
| BPD* | 57/131(44%) | 88/134(66%) | 0.4(0.25, 0.66) | <0.001 |
| BPD* or death | 74/131(56%) | 110/134(82%) | 0.28(0.06, 0.49) | <0.001 |
| mild* | 19/131(15%) | 21/134(16%) | 0.91(0.47, 1.79) | 0.79 |
| mod* | 26/131(20%) | 41/134(31%) | 0.56(0.32, 0.99) | 0.048 |
| severe* | 12/131(9%) | 26/134(19%) | 0.42(0.20, 0.87) | 0.017 |