Table 1.

Clinical characteristics of non-syndromic study population at baseline evaluation

Age (years), median (IQR)	10 (3–13)
Infant	60 (14.6%)
1–<6 years	73 (17.8%)
6–<12 years	113 (27.5%)
12–<16 years	165 (40.1%)
Male gender	271 (66%)
NYHA III/IV (n = 410)	15 (3.7%)
Maximal wall thickness at baseline (mm), mean (range) (n = 398)	17.0 (6–48)
Left ventricular outflow tract obstruction (>30 mmHg) (n = 374)	104 (27.8%)
Procedures during study period
Myectomy	37 (8.9%)
ICD	110 (26.8%)
Pacemaker	23 (5.6%)

n = 411 unless otherwise indicated.

ICD, implantable cardioverter-defibrillator; IQR, interquartile range; NYHA, New York Heart Association.