Table 1.

Clinical characteristics of the study population.

Characteristics	Gene ID Northern		Gene ID Central
	IVT	Control	IVT	Control
Total number of samples	277	728	301	803
Age, years	37 ± 15	47 ± 14	57 ± 20	62 ± 12
Sex (male/female)	120/157	486/240	145/114	375/312
Category
ILVT (%)&	118(42.6%)	N/A	83(32.0%)	N/A
RVOT (%)@	140(50.5%)	N/A	138(53.3%)	N/A
Other VT (%)	19 (6.9%)	N/A	38(14.7%)	N/A
Hypertension (%)$	N/A	90(12.3%)	N/A	355(51.7%)

Data are shown as the means ± SD for quantitative variables and as n (%) for qualitative variables.

*Age at first diagnosis of the disease.

^&ILVT: idiopathic left ventricular tachycardia.

^@RVOT: right ventricular outflow tract tachycardia.

^$Hypertension was defined as a systolic blood pressure of >140 mmHg or a diastolic blood pressure of >90 mmHg.