Table 7.
Cutoff levels for QT and QTc preoperative and postoperative measurements in atrial fibrillation groups.
| Cutoff | Sensitivity % (95% CI) | Sensitivity % (95% CI) | PPV % | NPV % | AUC | P-value | |
|---|---|---|---|---|---|---|---|
| Preoperative QT | 419,0 | 70,3 (59,4-79,3) | 69,2 (41,3-87,8) | 39,4 | 89,1 | 0,728 | 0,001 |
| Preoperative QTc | 434,5 | 78,4 (68,5-86,1) | 86,9 (59,1-96,8) | 65,1 | 9,34 | 0,814 | 0,001 |
| Postoperative QT | 423,5 | 59,5 (48,4-69,7) | 58,5 (32,1-80,8) | 29 | 83,5 | 0,651 | 0,005 |
| Postoperative QTc | 431,0 | 81,1 (71,0-88,3) | 88,5 (60,9-97,4) | 66,7 | 94,3 | 0,845 | 0,001 |
AUC=area under the curve; CI=confidence interval; NPV=negative predictive value; PPV=positive predictive value; QTc=corrected QT interval