Table 1.

Baseline Characteristics of Patients in Study

Description	Died Within 1 Year after ICD Implantation				P
	No (N=73,605)		Yes (N=10,187)
	N	%	N	%
Age: Mean (±SD)	75.23	6.03	76.80	6.28	<0.001
Gender: Female	21095	28.66	2690	26.41	<0.001
Race					<0.001
Hispanic	2949	4.01	488	4.79
White non-Hispanic	63000	85.59	8420	82.65
Black non-Hispanic	5850	7.95	1008	9.89
Other	1806	2.45	271	2.66
History and Risk Factors
Hemodialysis	2411	3.28	1149	11.28	<0.001
Syncope	9663	13.13	1607	15.78	<0.001
CHF Duration*					<0.001
No	80	0.11	15	0.15
Less than 3 months	11796	16.03	1782	17.49
3 to 9 months	11239	15.27	1311	12.87
Greater than 9 months	50490	68.60	7079	69.49
Most Recent LVEF >20%					<0.001
Unknown	618	0.84	108	1.06
No	23345	31.72	4123	40.47
Yes	49642	67.44	5956	58.47
NYHA Class					<0.001
Missing	51	0.07	5	0.05
Class I	2232	3.03	193	1.89
Class II	22873	31.08	1991	19.54
Class III	45239	61.46	6980	68.52
Class IV	3210	4.36	1018	9.99
Atrial Fibrillation/Atrial Flutter	29693	40.34	5063	49.70	<0.001
Ventricular Tachycardia	18011	24.47	3236	31.77	<0.001
Previous MI	40850	55.50	6141	60.28	<0.001
Prior Pacemaker Insertion					0.004
Unknown	20	0.03	4	0.04
No	60893	82.73	8548	83.91
Yes - Atrial Chamber	333	0.45	52	0.51
Yes - Ventricular Chamber	2081	2.83	296	2.91
Yes - Dual Chamber	9614	13.06	1187	11.65
Yes - Biventricular	664	0.90	100	0.98
CRT-D (current implant)	39114	53.14	5608	55.05	<0.001

^*Time since the initial CHF diagnosis.