Table 2 Characteristics of patients in learning dataset and test dataset (n = 224207)
| Â | Â | All patients (n = 224207) | Learning dataset (n = 179156) | Test dataset (n = 45051) | |||
|---|---|---|---|---|---|---|---|
| Â | Â | Patients | % | Patients | % | Patients | % |
Major Diagnostic Category | Nervous System | 16192 | 7.2 | 12996 | 7.3 | 3196 | 7.1 |
| Â | Respiratory System | 30284 | 13.5 | 24277 | 13.6 | 6007 | 13.3 |
| Â | Circulatory System | 29407 | 13.1 | 23570 | 13.2 | 5837 | 13.0 |
| Â | Digestive System, CHepatobiliary System And Pancreas | 51514 | 23.0 | 41125 | 23.0 | 10389 | 23.1 |
| Â | Blood and Blood Forming Organs and Immunological Disorders | 6070 | 2.7 | 4829 | 2.7 | 1241 | 2.8 |
| Â | Others | 90740 | 40.5 | 72359 | 40.4 | 18381 | 40.8 |
Sex | male | 119216 | 53.2 | 95343 | 53.2 | 23873 | 53.0 |
Age (years) | under60 | 104341 | 46.5 | 83518 | 46.6 | 20823 | 46.2 |
|  | 60–69 | 47703 | 21.3 | 38148 | 21.3 | 9555 | 21.2 |
|  | 70–79 | 51481 | 23.0 | 41104 | 22.9 | 10377 | 23.0 |
|  | 80–89 | 18033 | 8.0 | 14305 | 8.0 | 3728 | 8.3 |
| Â | 90- | 2649 | 1.2 | 2081 | 1.2 | 568 | 1.3 |
Status emergency | Â | 80515 | 35.9 | 64282 | 35.9 | 16233 | 36.0 |
Use of an ambulance | Â | 20052 | 8.9 | 15996 | 8.9 | 4056 | 9.0 |
Total score of Charlson Index | score0 | 153710 | 68.6 | 122898 | 68.6 | 30812 | 68.4 |
| Â | score1,2 | 50996 | 22.7 | 40812 | 22.8 | 10184 | 22.6 |
|  | score3–6 | 13742 | 6.1 | 10856 | 6.1 | 2886 | 6.4 |
|  | score7–12 | 4095 | 1.8 | 3234 | 1.8 | 861 | 1.9 |
| Â | score13- | 1664 | 0.7 | 1356 | 0.8 | 308 | 0.7 |
Length of stay (days) | under10 | 109769 | 49.0 | 87979 | 49.1 | 21790 | 48.4 |
|  | 10–19 | 52871 | 23.6 | 42114 | 23.5 | 10757 | 23.9 |
|  | 20–29 | 26190 | 11.7 | 20824 | 11.6 | 5366 | 11.9 |
| Â | 30- | 35377 | 15.8 | 28239 | 15.8 | 7138 | 15.8 |
Hospital mortality | Â | 6047 | 2.7 | 4804 | 2.7 | 1243 | 2.8 |