Table 3.

Comparison of R14del-positive patients by age

Characteristic	Age >45 years (n = 16)	Age <45 years (n = 18)	p-value
Age, median (IQR)	56.5 (54, 59.5)	29 (24, 30)	<0.001
Sex, female (%)	9 (56)	7 (39)	0.31
Low-voltage QRS (%)	11 (92)	2 (20)	<0.001
T‑wave inversion (%)	7 (70)	3 (33)	0.11
Signal-averaged ECG
– Filtered QRS duration, ms (IQR)	108 (104, 113)	108 (100, 112)	0.58
– Low-amplitude signal, ms (IQR)	46 (42, 53)	34 (28.5, 35.5)	0.007
– Root-mean-square, µV (IQR)	15 (11–23)	33 (26.5, 45)	0.005
– Late potentials, ≥1 (%)	9 (82)	2 (17)	0.002
Holter monitoring
– PVCs, median (IQR)	882.5 (470, 2653)	2 (1, 370)	<0.001
– > 500 PVCs (%)	9 (64)	3 (21)	0.022
LV dysfunction (%)	10 (67)	0 (0)	<0.001

IQR interquartile range, PVC premature ventricular complex, LV left ventricular