Table 2 QTc compared between groups
QTc between groups | Case group (N = 17) | Control group (N = 34) | Difference | p |
|---|---|---|---|---|
QTc in supine position mean (ms) | 423.7 (SD 27.4) | 391.4 (SD 22.4) | 32.3 | < 0.001 |
QTc in standing position mean (ms) | 443.5 (SD 39.5) | 403.3 (SD 21.3) | 40.2 | < 0.001 |
QTc change mean (ms) | 19.7 (SD 24.5) | 11.9 (SD 26.7) | 7.8 | 0.308 |
QTc > 440 m in supine position n (%) | 4/17 (23.6%) | 0/34 (0%) | 4 | 0.003 |
QTc > 440 m in standing position n (%) | 8/17 (47.0%) | 0/34 (0%) | 8 | < 0.001 |