Table 1

Baseline characteristics of the index and validation cohorts

VariablesIndex cohort
n=1208
Validation cohort
n=435
Age, years (SD)65.7±13.665.0±14.8
Male sex (%)642 (53.1)224 (51.5)
HR, bpm (SD)91.9±19.494±20.3
Systolic blood pressure, mm Hg (SD)154.2±29.8153.6±27.0
Diastolic blood pressure, mm Hg (SD)89.1±19.288.6±18.4
Event-time-to-troponin, hours (SD)5.8±8.84.0±5.4
HEART Score, median (IQR)5 (3)5 (3)
HISTORY, score 0 (%)512 (42.6)204 (46.9)
HISTORY, score 1 (%)402 (33.5)143 (32.9)
HISTORY, score 2 (%)287 (23.9)88 (20.2)
ECG, score 0 (%)522 (43.5)202 (46.4)
ECG, score 1 (%)511 (42.5)170 (39.1)
ECG, score 2 (%)168 (14.0)63 (14.5)
AGE, score 0 (%)77 (6.4)36 (8.3)
AGE, score 1 (%)441 (36.7)164 (37.7)
AGE, score 2 (%)683 (56.9)235 (54.0)
RISK, score 0 (%)163 (13.6)46 (10.6)
RISK, score 1 (%)383 (31.9)137 (31.5)
RISK, score 2 (%)665 (54.5)252 (57.9)
TROPONIN, score 0 (%)1041 (86.7)357 (82.1)
TROPONIN, score 1 (%)54 (4.5)25 (5.7)
TROPONIN, score 2 (%)106 (8.8)53 (12.2)
  • HEART, history, ECG, age, risk factors and troponin; HR, heart rate.;