Table 1 The basic characteristics of the infants in internal and external datasets
 | Internal cross-validation dataset (n = 906) | External validation dataset (n = 221) | ||||
---|---|---|---|---|---|---|
 | Normal group | Risk group | p value | Normal group | Risk group | p value |
n | 691 (76.3%) | 215 (23.7%) | Â | 173 (78.3%) | 48 (21.7%) | Â |
Sex | ||||||
Male | 353 (51.1%) | 114 (53.0%) | 0.676 | 87 (50.0%) | 27 (56.3%) | 0.570 |
Female | 338 (48.9%) | 101 (47.0%) | Â | 86 (50.0%) | 21 (43.8%) | Â |
GA (week) | 35.11 (3.22) | 35.68 (3.22) | 0.012 | 35.14 (3.34) | 35.58 (3.38) | 0.384 |
BW (g) | 2415.67 (665.88) | 2514.93 (699.11) | 0.093 | 2414.86 (687.62) | 2526.56 (671.03) | 0.313 |
CA (week) | 12.53 (2.72) | 12.53 (2.64) | 0.866 | 12.73 (2.72) | 12.75 (2.86) | 0.928 |