Multivariate Cox regression analysis for clinical and ECG predictors of shorter time to VT/VF postdiagnosis
| Feature | HR | 95% CI | P value |
| Initially VT/VF | 24.0 | (1.21 to 479) | 0.037 |
| Initial syncope | 7.19 | (0.622 to 83.1) | 0.114 |
| Other arrhythmia | 1.04 | (0.141 to 7.70) | 0.969 |
| QRS duration average | 1.06 | (0.975 to 1.16) | 0.171 |
| QTc interval average | 0.997 | (0.957 to 1.04) | 0.874 |
| P wave duration SD | 1.07 | (1.00 to 1.13) | 0.044 |
| QRS axis SD | 1.01 | (0.990 to 1.03) | 0.364 |
P-values less than 0.05 are shown in bold text.
QTc, corrected QT interval; VF, ventricular fibrillation; VT, ventricular tachycardia.