Table 3.
Baseline electrocardiographic characteristics by race and static/dynamic component of sport
| Overall, mean (SD) [IQR] | Race (n = 322) | p value | Static/dynamic sport group (n = 329) | p value | ||||||
|---|---|---|---|---|---|---|---|---|---|---|
| Black, mean (SD) (n = 72) | White, mean (SD) (n = 250) | IB, mean (SD) (n = 44) | IC, mean (SD) (n = 60) | IIB, mean (SD) (n = 23) | IIC, mean (SD) (n = 184) | IIIA, mean (SD) (n = 18) | ||||
| HR | 59.4 (10.1) (53–65) | 61.4 (9.9) | 58.9 (10.0) | 0.04 | 61.6 (11.1) | 59.0 (10.7) | 61.0 (10.5) | 58.8 (9.6) | 60.6 (9.7) | 0.57 |
| QRS duration (ms) | 90.4 (9.0) (85–96) | 87.6 (9.2) | 91.1 (8.8) | 0.01 | 92.6 (9.9) | 89.5 (9.3) | 86.8 (9.1) | 91.1 (8.3) | 88.4 (8.6) | 0.07 |
| QTc duration (ms) | 410.5 (20.8) (398–423) | 405.3 (21.0) | 411.7 (20.4) | 0.02 | 404.5 (17.4) | 414.2 (16.8) | 401.7 (21.3) | 413.5 (21.6) | 393.9 (18.2) | <0.01 |
| PR Interval (ms) | 151.2 (21.9) (136–163) | 159.6 (20.8) | 148.7 (21.7) | <0.01 | 148.1 (22.3) | 150.4 (20.6) | 156.1 (17.5) | 152.1 (22.4) | 146.4 (24.3) | 0.30 |
HR = heart rate; IQR = interquartile range; ms = millisecond; SD = standard deviation.