Table 3 Multivariate analysis: adjusted ORs for death for 5651* infants born after 24 weeks and before 32 weeks in 1998–9.
| Predictor variable | Died n (% of 386) | Survived n (% of 5265) | Adjusted OR (95% CI) | ||
|---|---|---|---|---|---|
| GA (weeks) | |||||
| 31 | 17 (4) | 1317 (25) | 1.00 | ||
| 30 | 24 (6) | 1042 (20) | 1.97 (1.05 to 3.70) | ||
| 29 | 31 (8) | 904 (17) | 2.75 (1.51 to 5.02) | ||
| 28 | 41 (11) | 724 (14) | 4.81 (2.70 to 8.58) | ||
| 27 | 62 (16) | 538 (10) | 9.18 (5.29 to 15.94) | ||
| 26 | 96 (25) | 448 (9) | 16.22 (9.53 to 27.61) | ||
| 25 | 115 (30) | 292 (6) | 32.04 (18.83 to 54.5)] | ||
| Weight for GA (centile group) | |||||
| 97+ | 8 (2) | 83 (2) | 1.38 (0.63 to 3.04) | ||
| 75–<97 | 48 (12) | 1104 (21) | 0.66 (0.47 to 0.93) | ||
| 25–<75 | 166 (43) | 2746 (52) | 1.00 | ||
| 3–<25 | 118 (31) | 1175 (22) | 2.00 (1.52 to 2.62) | ||
| <3 | 46 (12) | 157 (3) | 6.91 (4.52 to 10.55) | ||
| Male sex | 252 (65) | 2888 (55) | 1.58 (1.25 to 1.99) | ||
| Hypertension in pregnancy | 64 (17) | 1190 (23) | 0.51 (0.37 to 0.71) | ||
*Data for hypertension in pregnancy were missing for 62 mothers.
Area under ROC = 0.82.
Hosmer–Lemeshow goodness of fit = 2.19 on 7 degrees of freedom, p = 0.95.
GA, Gestational age.