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=8370N=9704
In-hospital mortality621 (7.4)687 (7.1)0.3793
Female2519 (30.1)3121 (32.2)0.0028
Age (years), mean (SD)65.4 (12.8)65.9 (12.7)0.0081
 <40195 (2.3)213 (2.2)<0.0001
 40–49910 (10.9)891 (9.2)
 50–591600 (19.1)1816 (18.7)
 60–692090 (25.0)2674 (27.6)
 70–792431 (29.0)2590 (26.7)
 ≥801144 (13.7)1520 (15.7)
Han7701 (92.0)9285 (95.7)<0.0001
Married7460 (89.1)8740 (90.1)0.0391
Having medical insurance5126 (61.2)7507 (77.4)<0.0001
 Admission at cardiology department4087 (48.8)6532 (67.3)<0.0001
Admission diagnosis
 Cardiac arrest6 (0.1)18 (0.2)0.0362
Discharge diagnosis
 STEMI5509 (65.8)4753 (49.0)<0.0001
 Acute extensive anterior MI967 (11.6)769 (7.9)<0.0001
 Acute anterior MI1504 (18.0)1310 (13.5)<0.0001
 Acute anterior septal MI587 (7.0)408 (4.2)<0.0001
 Acute inferior MI2558 (30.6)2214 (22.8)<0.0001
 Acute lateral MI359 (4.3)311 (3.2)0.0001
 Acute posterior MI699 (8.4)502 (5.2)<0.0001
 Acute right ventricular infarction615 (7.3)418 (4.3)<0.0001
 Hypertension3894 (46.5)5080 (52.3)<0.0001
 Diabetes mellitus1650 (19.7)2345 (24.2)<0.0001
 Dyslipidaemia836 (10.0)1434 (14.8)<0.0001
 Cardiogenic shock403 (4.8)510 (5.3)0.1773
 Heart failure2853 (34.1)3793 (39.1)<0.0001
 Stroke655 (7.8)1389 (14.3)<0.0001
 Renal failure259 (3.1)684 (7.0)<0.0001
  • MI, myocardial infarction; MRFP, medical record front page; STEMI, ST-segment elevation myocardial infarction.