Table 1.

Participant baseline characteristics.

VariableCaucasianAfrican AmericanP
Total, n1333514
Age, yearsa61.7 ± 12.957.3 ± 13.2<0.001
Male, n (%)940 (70.5)283 (55.1)<0.001
Current smoker, n (%)431 (32.6)208 (41.1)<0.001
High school education, n (%)677 (51.8)130 (26.0)<0.001
Body mass index, kg/m2a29.2 ± 6.429.1 ± 7.10.859
Prior myocardial infarction, n (%)269 (20.2)133 (25.9)0.008
Prior coronary artery disease, n (%)440 (33.0)188 (36.6)0.147
Prior congestive heart failure, n (%)109 (8.2)135 (26.3)<0.001
Prior cerebrovascular event, n (%)73 (5.5)57 (11.1)<0.001
Prior peripheral vascular disease, n (%)128 (9.6)31 (6.0)0.014
Hypertension, n (%)799 (59.9)406 (79.0)<0.001
Diabetes, n (%)335 (25.1)207 (40.3)<0.001
Hypercholesterolemia, n (%)681 (51.1)212 (41.2)<0.001
Chronic lung disease, n (%)188 (14.1)79 (15.4)0.488
Cancer, n (%)114 (8.6)29 (5.6%)0.036
Final MI study diagnosis<0.001
    STEMI, n (%)651 (48.8)124 (24.1)
    NSTEMI, n (%)682 (51.2)390 (75.9)
Ejection fraction <40%, n (%)324 (24.3)155 (30.3)0.009
Initial acute heart rate, beats/mina79.1 ± 20.285.9 ± 22.3<0.001
Serum creatinine, mg/dl, median (IQR)1.0 (0.9 to 1.2)1.2 (0.9 to 2.0)<0.001
Hematocrit, g/dla40.5 ± 5.838.4 ± 6.6<0.001
eGFR category, ml/min per 1.73 m2<0.001
    0.0 to 29.967 (5.0)112 (21.8)
    30.0 to 59.9285 (21.4)92 (17.9)
    60.0 to 89.9650 (48.8)139 (27.0)
    ≥90.0331 (24.8)171 (33.3)
  • a Continuous data shown as mean ± 1 SD.

    MI, myocardial infarction; STEMI, ST-elevation myocardial infarction; NSTEMI, non-ST-elevation infarction; IQR, interquartile range.