Table 2.

Cox's proportional hazards analyses for all-cause mortality in patient subgroups

	Unadjusted HR (95% CI)	P-value	Adjusted HRa (95% CI)	P-value
Overall	2.21 (2.00–2.44)	<0.001	2.15 (1.95–2.38)	<0.001
Device type
CRT ± D	2.22 (1.96, 2.50)	<0.001	2.23 (1.97, 2.52)	<0.001
ICD	2.04 (1.73, 2.41)	<0.001	1.95 (1.65, 2.30)	<0.001
Defibrillator shocks
Present	2.29 (1.68, 3.11)	<0.001	2.36 (1.74, 3.21)	<0.001
Not present	2.18 (1.96, 2.41)	<0.001	2.10 (1.90, 2.34)	<0.001
Device-detectable AFb
Present	2.16 (1.79, 2.60)	<0.001	2.14 (1.77, 2.59)	<0.001
Not present	2.13 (1.90, 2.39)	<0.001	2.09 (1.86. 2.34)	<0.001

^aCox's regression adjusted for age and gender.

^bDevice-detectable AF defined as presence of AF >6 h of detection for at least 1 day.