Table 2 Patient characteristics.
Characteristics | All | Training data set | Testing data set | p value |
|---|---|---|---|---|
Patient number, n (%) | 3200 (100%) | 2240 (70%) | 960 (30%) | |
GA, week, mean ± SD | 27.47 ± 2.35 | 27.48 ± 2.35 | 27.44 ± 2.35 | 0.613 |
BW, per 100 g, mean ± SD | 9.28 ± 2.80 | 9.27 ± 2.80 | 9.29 ± 2.79 | 0.832 |
SGA*, n (%) | 1014 (32%) | 725 (30%) | 289 (32%) | 0.029** |
Sex, female, n (%) | 1496 (47%) | 1,050 (47%) | 446 (46%) | 0.829 |
Outborn, n (%) | 203 (6%) | 132 (6%) | 71 (7%) | 0.110 |
Maternal history | ||||
Antenatal corticosteroid, n (%) | 2781 (87%) | 1950 (87%) | 831 (87%) | 0.706 |
Antenatal MgSO4, n (%) | 1926 (60%) | 1349 (60%) | 577 (60%) | 0.950 |
Chorioamnionitis, n (%) | 580 (18%) | 397 (18%) | 183 (19%) | 0.367 |
Maternal hypertension, n (%) | 747 (23%) | 521 (23%) | 226 (24%) | 0.862 |
Caesarean section, n (%) | 2,239 (70%) | 1580 (71%) | 659 (69%) | 0.285 |
Multiple births, n (%) | 936 (29%) | 658 (29%) | 278 (29%) | 0.812 |
