Machine learning-based prediction of postoperative mortality risk after abdominal surgery

Table 3 Comparison of predictors between the training and validation cohorts, mean ± SD

Index	Training cohort (n = 161)	Validation cohort (n = 69)	t	P value
Age	57.67 ± 5.80	57.99 ± 6.46	-0.364	0.716
APTT	28.16 ± 4.00	28.41 ± 3.99	-0.424	0.672
AST	38.41 ± 10.75	39.80 ± 12.33	-0.860	0.391
TBIL	21.44 ± 4.75	22.20 ± 5.24	-1.081	0.281
WBC	10.33 ± 3.59	9.88 ± 3.84	0.856	0.393

APTT: Activated partial thromboplastin time; AST: Aspartate aminotransferase; TBIL: Total bilirubin; WBC: White blood cell.