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Estimated odds ratios for mortality based on levels of QTc prolongation
| OR | P | 95%CI | |
| Mild QTc prolongation vs none | 1.67 | 0.045 | 1.01-2.76 |
| Moderate QTc prolongation vs none | 2.11 | 0.013 | 1.17-3.81 |
| Severe QTc prolongation vs none | 1.83 | 0.044 | 1.02-3.31 |
Mild QTc prolongation: 451-470 ms in males and 471-490 ms in females; Moderate QTc prolongation: 471-490 ms in males and 491-510 ms in females; Severe QTc prolongation: > 490 ms in males and > 510 ms in females.
