Table 1.

Baseline Characteristics According to ICD Status.

	ICD (N = 343)	No ICD (N = 857)	P Value
Demographics
Age, mean ± SD, years	74.5 ± 6.0	75.7 ± 7.1	0.005
Male sex	216 (63.0)	453 (52.9)	0.001
Race
White	283 (89.3)	715 (89.0)	0.59
Black	25 (7.9)	72 (9.0)
Other	9 (2.8)	16 (2.0)
Missing	26	54
Pre-existing conditions
Diabetes mellitus	119 (34.7)	254 (29.6)	0.09
History of heart failure	132 (38.5)	246 (28.7)	<0.001
Heart failure this admission	110 (32.1)	173 (20.2)	< 0.001
History of myocardial infarction	116 (33.8)	237 (27.7)	0.03
Atrial arrhythmia	221 (64.4)	466 (54.4)	0.001
Respiratory insufficiency	59 (17.2)	240 (28.0)	< 0.001
Renal insufficiency	68 (19.8)	191 (22.3)	0.35
Hypotension	37 (10.8)	135 (15.8)	0.03
Metabolic or electrolyte abnormality	14 (4.1)	97 (11.3)	< 0.001
Pneumonia	15 (4.4)	70 (8.2)	0.02
Baseline depression in CNS function	16 (4.7)	70 (8.2)	0.02
Septicemia	10 (2.9)	43 (5.0)	0.11
Acute stroke	8 (2.3)	19 (2.2)	0.90
Hepatic insufficiency	2 (0.6)	14 (1.16)	0.26
Major trauma	1 (0.3)	10 (1.2)	0.19
Interventions in place
Mechanical ventilation	35 (10.2)	185 (21.6)	< 0.001
Dialysis	2 (0.6)	12 (1.4)	0.37
Event characteristics
Hospital-wide response activation	292 (85.1)	628 (73.3)	<0.001
Use of automated external defibrillator	48 (14.0)	109 (12.7)	0.55
Initial cardiac arrest rhythm			0.07
Ventricular fibrillation	201 (58.6)	550 (64.2)
Pulseless ventricular tachycardia	142 (41.4)	307 (35.8)
Discharge status
Principal discharge diagnosis			<0.001
Cardiac	284 (82.8)	573 (66.9)
Non-cardiac	59 (17.2)	284 (33.1)
Neurological disability			0.003
Minimal to none	238 (69.4)	517 (60.3)
Moderate	105 (30.6)	340 (39.7)
Disposition			<0.001
Home self-care	155 (45.2)	281 (32.8)
Home with home health care	78 (22.7)	155 (18.1)
Skilled nursing facility	64 (18.7)	203 (23.7)
Other inpatient facility (e.g., rehabilitation)	42 (12.2)	207 (24.2)
Other	4 (1.2)	11 (1.3)

Abbreviations: CNS, central nervous system