| Predictors | Odds ratio (95% CI) | Area under ROC curve | p Value |
| Univariate analysis (controlling for time from baseline evaluation to most recent follow-up) | |||
| Age at TOF repair ⩾6 years | 7.78 (2.26 to 26.7) | 0.748 | 0.001 |
| Era of repair before 1970 | 4.05 (1.11 to 14.8) | 0.591 | 0.035 |
| RV end-diastolic volume Z ⩾7 | 4.98 (1.47 to 16.9) | 0.688 | 0.01 |
| RV end-systolic volume index >50 ml/m2 | 5.82 (1.22 to 27.7) | 0.708 | 0.027 |
| RV ejection fraction <45% | 5.31 (1.59 to 17.8) | 0.750 | 0.007 |
| LV ejection fraction <55% | 7.13 (2.11 to 24.0) | 0.760 | 0.002 |
| LV mass/volume ratio >1.5 | 4.56 (1.27 to 16.4) | 0.688 | 0.02 |
| QRS ⩾180 ms | 6.27 (1.86 to 21.1) | 0.673 | 0.003 |
| Diuretics at baseline evaluation | 7.68 (2.03 to 29.1) | 0.646 | 0.003 |
| Digoxin at baseline evaluation | 4.67 (1.30 to 16.8) | 0.689 | 0.018 |
| β-Blocker at baseline evaluation | 6.88 (1.12 to 42.3) | 0.654 | 0.037 |
| NYHA class II or III at baseline evaluation | 5.27 (1.55 to 17.9) | 0.724 | 0.008 |
| Multivariate analysis (controlling for time from baseline evaluation to most recent follow-up) | |||
| Model 1 | |||
| LV ejection fraction <55% | 8.05 (2.14 to 30.2) | 0.002 | |
| RV end-diastolic volume Z ⩾7 | 4.55 (1.10 to 18.8) | 0.037 | |
| Area under ROC curve for the model: 0.850 | |||
| Model 2 | |||
| RV ejection fraction <45% | 5.60 (1.47 to 21.2) | 0.011 | |
| RV end-diastolic volume Z ⩾7 | 4.00 (1.10 to 14.6) | 0.036 | |
| Area under ROC curve for the model: 0.807 | |||
CI, confidence interval; LV, left ventricular; ROC, receiver operator characteristic; RV, right ventricular; TOF tetralogy of Fallot.