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 men | European-American women | African-American men | African-American women | |
|---|---|---|---|---|
| n | 333 | 291 | 50 | 77 |
| Age (years) | 62.2 ± 9.4 | 60.9 ± 10.4 | 59.1 ± 8.5 | 59.6 ± 9.7 |
| BMI (kg/m2) | 30.6 ± 5.3 | 32.5 ± 7.4 | 31.4 ± 6.3 | 34.5 ± 7.3 |
| Total cholesterol (mg/dl) | 178.2 ± 38.6 | 198.9 ± 44.3 | 178.9 ± 33.0 | 194.5 ± 35.7 |
| Smoking | ||||
| Current | 17.2 (57) | 17.6 (51) | 42.0 (21) | 13.3 (10) |
| Past | 59.0 (197) | 23.8 (69) | 46.0 (23) | 33.3 (26) |
| Never | 23.8 (79) | 58.6 (171) | 12.0 (6) | 53.3 (41) |
| Diabetes diagnosis | 85.3 (284) | 79.0 (230) | 96.0 (48) | 87.0 (67) |
| Duration of diabetes (years) | 10.6 ± 7.6 | 9.5 ± 6.1 | 11.0 ± 8.2 | 11.2 ± 8.3 |
| Hypertension | 79.9 (266) | 83.2 (242) | 78.0 (39) | 87.0 (67) |
| RR interval | 0.015 ± 0.0027 | 0.0143 0.0024 | 0.0151 ± 0.0026 | 0.0143 ± 0.0023 |
| Unadjusted QT interval duration (ms) | 394.0 ± 34.2 | 392.3 ± 32.1 | 398.0 ± 34.7 | 392.8 ± 30.0 |
| QRS duration (ms) | 94.3 ± 10.6 | 87.5 ± 9.7 | 93.9 ± 12.7 | 85.7 ± 8.8 |
Data are means ± SD.