Table 1.
Patients’ characteristics from MRFP data and in-hospital mortality in modelling cohort and validation cohort
| Modelling cohort (year 2011) | Validation cohort (year 2015) | P value | |
| N=8370 | N=9704 | ||
| In-hospital mortality | 621 (7.4) | 687 (7.1) | 0.3793 |
| Female | 2519 (30.1) | 3121 (32.2) | 0.0028 |
| Age (years), mean (SD) | 65.4 (12.8) | 65.9 (12.7) | 0.0081 |
| <40 | 195 (2.3) | 213 (2.2) | <0.0001 |
| 40–49 | 910 (10.9) | 891 (9.2) | |
| 50–59 | 1600 (19.1) | 1816 (18.7) | |
| 60–69 | 2090 (25.0) | 2674 (27.6) | |
| 70–79 | 2431 (29.0) | 2590 (26.7) | |
| ≥80 | 1144 (13.7) | 1520 (15.7) | |
| Han | 7701 (92.0) | 9285 (95.7) | <0.0001 |
| Married | 7460 (89.1) | 8740 (90.1) | 0.0391 |
| Having medical insurance | 5126 (61.2) | 7507 (77.4) | <0.0001 |
| Admission at cardiology department | 4087 (48.8) | 6532 (67.3) | <0.0001 |
| Admission diagnosis | |||
| Cardiac arrest | 6 (0.1) | 18 (0.2) | 0.0362 |
| Discharge diagnosis | |||
| STEMI | 5509 (65.8) | 4753 (49.0) | <0.0001 |
| Acute extensive anterior MI | 967 (11.6) | 769 (7.9) | <0.0001 |
| Acute anterior MI | 1504 (18.0) | 1310 (13.5) | <0.0001 |
| Acute anterior septal MI | 587 (7.0) | 408 (4.2) | <0.0001 |
| Acute inferior MI | 2558 (30.6) | 2214 (22.8) | <0.0001 |
| Acute lateral MI | 359 (4.3) | 311 (3.2) | 0.0001 |
| Acute posterior MI | 699 (8.4) | 502 (5.2) | <0.0001 |
| Acute right ventricular infarction | 615 (7.3) | 418 (4.3) | <0.0001 |
| Hypertension | 3894 (46.5) | 5080 (52.3) | <0.0001 |
| Diabetes mellitus | 1650 (19.7) | 2345 (24.2) | <0.0001 |
| Dyslipidaemia | 836 (10.0) | 1434 (14.8) | <0.0001 |
| Cardiogenic shock | 403 (4.8) | 510 (5.3) | 0.1773 |
| Heart failure | 2853 (34.1) | 3793 (39.1) | <0.0001 |
| Stroke | 655 (7.8) | 1389 (14.3) | <0.0001 |
| Renal failure | 259 (3.1) | 684 (7.0) | <0.0001 |
MI, myocardial infarction; MRFP, medical record front page; STEMI, ST-segment elevation myocardial infarction.