| | Baseline variables | Training group () | Validation group () | value |
| | Age (IQR, years) | 65 (47-74) | 64 (46-75) | 0.412 | | Male (, %) | 148 (55.01%) | 41 (60.2%) | 0.532 | | Systolic blood pressure (IQR, mm Hg) | 133 (113-143) | 132.5 (114-142.5) | 0.456 | | Diastolic blood pressure (IQR, mm Hg) | 76 (72-81) | 75 (71-80.5) | 0.258 | | Heart rate (IQR, beats/min) | 100 (85-118) | 99.5 (84-117.5) | 0.338 | | WBC (IQR, ×109/L) | 13.4 (9.4-18) | 13.55 (9.4-17.9) | 0.217 | | PLT (IQR, ×109/L) | 229 (176.5-309.5) | 226 (173.5-311.5) | 0.113 | | MCV (IQR, fL) | 90 (86-95) | 88 (85-94.5) | 0.216 | | HCT (IQR) | 0.375 (0.324-0.42) | 0.383 (0.335-0.43) | 0.109 | | Glucose (IQR, mg/dL) | 140 (108-184) | 138 (112-182) | 0.214 | | PT (IQR, s) | 13.7 (12.9-15.1) | 13.8 (12.6-15) | 0.315 | | TT (IQR, s) | 27.8 (24.8-34.5) | 27.6 (24.5-33.8) | 0.146 | | Albumin (IQR, g/dL) | 3.2 (2.7-3.8) | 3.3 (2.7-3.9) | 0.476 | | Creatine kinase, MB isoenzyme (IQR, IU/L) | 4 (4-4) | 4 (3.5-4) | 0.517 | | ALT (IQR, IU/L) | 45 (22.5-134.5) | 47 (24.5-139) | 0.108 | | AST (IQR, IU/L) | 61 (30-138) | 63 (31.5-136) | 0.313 | | Total bilirubin (IQR, mg/dL) | 0.9 (0.5-2) | 0.9 (0.5-2.1) | 0.447 | | Creatinine (IQR, mg/dL) | 1 (0.7-1.7) | 0.9 (0.7-1.8) | 0.283 | | Amylase (IQR, IU/L) | 287 (103.5-756.5) | 290 (111-733.5) | 0.102 | | Lipase (IQR, IU/L) | 562 (99.5-1697) | 555 (101.5-1675) | 0.118 | | LDH (IQR, IU/L) | 350.5 (258-500) | 352 (257-498.5) | 0.334 | | Total calcium (IQR, mg/dL) | 8.2 (7.6-8.9) | 8.1 (7.6-8.9) | 0.618 | | Sodium (IQR, mmol/L) | 139 (136-141) | 138 (136-140) | 0.337 | | Anion gap (IQR, mmol/L) | 16 (13.5-19) | 15.5 (13.5-18.5) | 0.223 | | Lactate (IQR, mmol/L) | 1.6 (1.3-2.1) | 1.7 (1.3-2.0) | 0.165 | | Triglyceride (IQR, mg/dL) | 138 (118-175.5) | 135 (117-174.5) | 0.427 | | In-hospital mortality | 29 (10.78%) | 9 (13.23%) | 0.315 |
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