Table 1.

Baseline characteristics

	Overall population (n= 21 217)	Early threshold crossing (n= 7623)	No early threshold crossing (n= 13 594)	P-value
Mean age (years)	68 ±12	69 ± 12	68 ± 12	<0.001
Male gender (%)	75	73	76	<0.001
CRT ± D (%)	51	55	49	<0.001
Mean duration from implantation (months)	20 ± 9	19 ± 9	20 ± 9	<0.001
Defibrillator shock for VT/VF (%)a	8	10	6	<0.001
Device-detectable atrial fibrillation (%)a	19	23	17	<0.001

^aDuring the observation period.