TABLE 1

Clinical characteristics of 624 European-American and 127 African-American Diabetes Heart Study participants after exclusion of individuals with history of myocardial infarction or on QT-altering medications

European-American menEuropean-American womenAfrican-American menAfrican-American women
n3332915077
Age (years)62.2 ± 9.460.9 ± 10.459.1 ± 8.559.6 ± 9.7
BMI (kg/m2)30.6 ± 5.332.5 ± 7.431.4 ± 6.334.5 ± 7.3
Total cholesterol (mg/dl)178.2 ± 38.6198.9 ± 44.3178.9 ± 33.0194.5 ± 35.7
Smoking
    Current17.2 (57)17.6 (51)42.0 (21)13.3 (10)
    Past59.0 (197)23.8 (69)46.0 (23)33.3 (26)
    Never23.8 (79)58.6 (171)12.0 (6)53.3 (41)
Diabetes diagnosis85.3 (284)79.0 (230)96.0 (48)87.0 (67)
Duration of diabetes (years)10.6 ± 7.69.5 ± 6.111.0 ± 8.211.2 ± 8.3
Hypertension79.9 (266)83.2 (242)78.0 (39)87.0 (67)
RR interval0.0152 ± 0.00270.0143 ± 0.00240.0151 ± 0.00260.0143 ± 0.0023
Unadjusted QT interval duration (ms)394.0 ± 34.2392.3 ± 32.1398.0 ± 34.7392.8 ± 30.0
QRS duration (ms)94.3 ± 10.687.5 ± 9.793.9 ± 12.785.7 ± 8.8
  • Data are means ± SD.