Table 4.

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.