Importance of different variables used in random survival forest analysis
| Variable | Importance | Rank |
| Prior VT/VF | 0.3120 | 1 |
| Syncope or spontaneous VT/VF | 0.0289 | 2 |
| Age | 0.0055 | 3 |
| QTc interval | 0.0039 | 4 |
| QRS axis | 0.0030 | 5 |
| Syncope | 0.0024 | 6 |
| P wave axis | 0.0015 | 7 |
| QT interval | 0.0014 | 8 |
| T wave axis | 0.0012 | 9 |
| QRS interval | 0.0008 | 10 |
| SV1 amplitude | 0.0004 | 11 |
| PR interval | 0.0002 | 12 |
| P wave duration | 0.0001 | 13 |
| Sex | 0.0001 | 14 |
| Positive genetic test | 0.0001 | 15 |
| Fever induced type 1 | 0.0000 | 16 |
| Ventricular rate | 0.0000 | 17 |
| Initial type 1 Brugada pattern | 0.0000 | 18 |
| Brugada pattern evolution | 0.0000 | 19 |
| Family history of Brugada syndrome | −0.0001 | 20 |
| Positive electrophysiological study | −9.02E-05 | 21 |
| RV5 amplitude | −1.98E-04 | 22 |
| Family history of sudden cardiac death | −2.09E-04 | 23 |
| Positive Holter findings | −2.12E-04 | 24 |
| Presence of other arrhythmias | −2.78E-04 | 25 |
| Fever | −3.18E-04 | 26 |
QTc, corrected QT interval; RV5, R-wave amplitude in V5; SV1, S-wave amplitude in lead V1; VF, ventricular fibrillation; VT, ventricular tachycardia.