Table 1

Baseline characteristics by sex and age group

All patients, (n=1506)Women, (n=597)Men, (n=909)P valueAge <70, (n=1039)Age ≥70, (n=467)P value
Baseline characteristics
Age, years62.3±33.165.1±28.660.4±35.2<0.001 (T)54.6±20.979.3±29.5<0.001 (T)
Symptom to arrival time, hours8.6 (3.1–52.7)8.6 (2.8–51.2)8.9 (3.2–56.25)0.266 (W)9.1 (3.1–55.0)8.3 (3.1–50.8)0.449 (W)
Hospital stay, hours28.0 (22–69)26.0 (22–50)32.0 (22–73)<0.001 (W)26.0 (21–62)44.0 (24–78)<0.001 (W)
Acute MI175 (11.6)53 (8.9)122 (13.4)0.007 (C)99 (9.5)76 (16.3)<0.001 (C)
Risk factors
Hypertension, %616 (40.9)266 (44.6)350 (38.5)0.019 (C)337 (32.4)279 (59.7)<0.001 (C)
Hyperlipidaemia, known %303 (20.1)121 (20.3)182 (20.0)0.907 (C)193 (18.6)110 (23.6)0.026 (C)
Hyperlipidaemia, new,* %142 (9.4)71 (11.9)71 (7.8)0.008 (C)98 (9.4)44 (9.4)0.995 (C)
Diabetes mellitus, %181 (12.0)62 (10.4)119 (13.1)0.114 (C)105 (10.1)76 (16.3)0.001 (C)
Insulin-dependent51 (3.4)18 (3.0)33 (3.6)0.518 (C)26 (2.5)25 (5.4)0.005 (C)
Family history, %275 (18.3)117 (19.6)158 (17.4)0.276 (C)224 (19.8)51 (10.9)<0.001 (C)
Current smoker, %284 (18.9)118 (19.8)166 (18.3)0.466 (C)206 (19.8)78 (16.7)0.152 (C)
Previous smoker, %658 (43.7)248 (41.5)410 (45.1)0.173 (C)445 (42.8)213 (45.6)0.314 (C)
Medical history
Prior MI, %289 (19.2)76 (12.7)213 (23.4)<0.001 (C)141 (13.6)148 (31.7)<0.001 (C)
Prior PCI, %293 (19.5)73 (12.2)220 (24.2)<0.001 (C)159 (15.3)134 (28.7)<0.001 (C)
Prior CABG, %111 (7.4)18 (3.0)93 (10.2)<0.001 (C)45 (4.3)66 (14.1)<0.001 (C)
Heart failure, %52 (3.4)18 (3.0)34 (3.7)0.451 (C)20 (1.9)32 (6.9)<0.001 (C)
Stroke, %42 (2.8)12 (2.0)30 (3.3)0.137 (C)17 (1.6)25 (5.4)<0.001 (C)
Peripheral vascular disease, %29 (1.9)9 (1.5)20 (2.2)0.339 (C)11 (1.1)18 (3.9)<0.001 (C)
Vital parameters at admission
Systolic BP, mm Hg145.9±41.0147.2±47.3143.8±40.10.003 (T)142.9±41.0150.1±46.4<0.001 (T)
Diastolic BP, mm Hg84.3±25.381.5±26.785.4±24.9<0.001 (T)85.2±24.680.8±27.5<0.001 (T)
Heart rate, bpm72.7±32.975.9±32.374.2±38.10.069 (T)74.1±31.076.6±25.00.012 (T)
BMI†27.4±9.226.4±9.628.0±8.8<0.001 (T)28.0±9.426.2±8.3<0.001 (T)
ECG findings
ST segment depression, %47 (3.1)22 (3.7)25 (2.8)0.307 (C)21 (2.0)26 (5.6)<0.001 (C)
T-wave inversion, %47 (3.1)18 (3.0)29 (3.2)0.848 (C)33 (3.2)14 (3.0)0.854 (C)
  • Values are median (IQR), mean±2 SD, or n (%).

  • *Total cholesterol ≥6.5 ng/L at presentation.

  • †Data missing in 50.6% (762/1506).

  • BMI, body mass index; BP, blood pressure; C, chi-square; CABG, coronary artery bypass grafting; FE, Fischer's exact; MI, myocardial infarction; PCI, percutaneous coronary intervention; T, two-sample t-test; W, Wilcoxon.