Table.

Characteristics of the Study Sample, Separately for Patients Who Received CRT-P and CRT-D Devices

	CRT-P, N (%)	CRT-D, N (%)	SMD	All, N (%)
Female	5285 (44)	16 731 (28)	0.34	22 016 (31)
Age 65–70	1039 (9)	10 469 (18)	−0.265	11 508 (16)
Age 70–75	1889 (16)	15 184 (26)	−0.240	17 073 (24)
Age 75–80	2616 (22)	16 690 (28)	−0.141	19 306 (27)
Age 80–85	3152 (26)	12 477 (21)	0.129	15 629 (22)
Age 85+	3229 (27)	4714 (8)	0.521	7943 (1 1)
2006	1229 (10)	10 584 (18)	−0.216	11813 (17)
2007	1339 (11)	9401 (16)	−0.134	10 740 (15)
2008	1472 (12)	8518 (14)	−0.058	9990 (14)
2009	1698 (14)	8807 (15)	−0.016	10 505 (1 5)
2010	2049 (17)	8557 (14)	0.077	10 606 (15)
2011	2038 (17)	7303 (12)	0.137	9341 (13)
2012	2100 (18)	6364 (1 1)	0.200	8464 (12)
Race white	11 399 (96)	55 145 (93)	0.126	66 544 (93)
Race black	346 (3)	3403 (6)	−0.139	3749 (5)
Race Hispanic	55 (0)	267 (0)	0.002	322 (0)
Race other	118 (1)	677 (1)	−0.014	795 (1)
Ischemic disease	7339 (62)	45 244 (76)	−0.316	52 583 (74)
Cardiomyopathy	3641 (31)	27 636 (46)	−0.331	31 277 (44)
Atrial fibrillation	7983 (67)	23 086 (39)	0.588	31 069 (43)
Conduction disorder	3775 (32)	21 845 (37)	−0.106	25 620 (36)
Arrhythmia	3808 (32)	15 235 (26)	0.140	19 043 (27)
Prior HF admission	1945 (16)	12 194 (20)	−0.108	14 139 (20)
Cardiac arrest	94 (1)	1171 (2)	−0.101	1265 (2)
3+ comorbidities	5287 (44)	25 842 (43)	0.019	31 129 (44)
2 comorbidities	2642 (22)	13 412 (23)	−0.009	16 054 (22)
1 comorbidity	2514 (21)	11 880 (20)	0.028	14 394 (20)
No comorbidities	1482 (12)	8400 (14)	−0.050	9882 (14)

CRT-D indicates cardiac resynchronization therapy defibrillators; CRT-P, CRT- pacemaker; HF, heart failure; and SMD, standardized mean difference.