Table 4 Effectiveness of implantable cardioverter defibrillators (ICDs) in demographic subgroups in latency 180 day* and latency 365 day* analyses

	Sample size (ICD/no ICD)	% of eligible patients received ICD	Event (ICD/no ICD)	IR† (ICD/no ICD)	Adjusted HR (95% CI)‡
					Latency 180 day	Latency 365 day
Outcome=death
Age (years):
66-70	1322/2534	34	285/568	127/137	0.89 (0.70 to 1.13)	1.02 (0.77 to 1.36)
71-75	1347/2950	31	301/755	136/168	1.11 (0.88 to 1.40)	1.33 (1.02 to 1.74)
76-80	1394/3670	28	362/1068	172/216	0.92 (0.75 to 1.12)	0.82 (0.65 to 1.04)
≥81	1195/8699	12	359/2908	213/345	0.78§ (0.65 to 0.93)	0.78§ (0.63 to 0.96)
Sex:
Men	3763/9321	29	945/2779	161/245	0.92 (0.81 to 1.04)	0.96 (0.82 to 1.11)
Women	1495/8532	14	362/2520	152/237	0.90 (0.75 to 1.07)	0.90 (0.74 to 1.10)
Race:
White	4392/15 068	23	1088/4402	156/241	0.90 (0.81 to 1.01)	0.96 (0.84 to 1.10)
Black	613/1790	26	154/594	172/240	0.93 (0.70 to 1.24)	0.82 (0.57 to 1.16)
Other	253/995	20	65/303	181/240	0.94 (0.60 to 1.47)	0.84 (0.50 to 1.39)
Outcome=sudden cardiac death
Age (years):
66-70	1322/2534	34	73/125	33/30	1.04 (0.63 to 1.72)	1.12 (0.62 to 2.00)
71-75	1347/2950	31	59/176	27/39	0.81 (0.48 to 1.35)	0.73 (0.41 to 1.27)
76-80	1394/3670	28	99/215	47/44	1.43 (0.95 to 2.14)	1.30 (0.82 to 2.07)
≥81	1195/8699	12	99/810	59/96	0.74 (0.52 to 1.04)	0.80 (0.54 to 1.18)
Sex:
Men	3763/9321	29	248/732	42/65	1.00 (0.78 to 1.28)	1.08 (0.82 to 1.42)
Women	1495/8532	14	82/594	35/56	0.86 (0.59 to 1.26)	0.75 (0.50 to 1.15)
Race:
White	4392/15 068	23	288/1121	41/61	0.98 (0.79 to 1.23)	1.06 (0.82 to 1.36)
Black	613/1790	26	31/135	35/54	0.77 (0.40 to 1.47)	0.44 (0.20 to 1.00)
Other	253/995	20	11/70	31/55	0.75 (0.24 to 2.33)	0.60 (0.16 to 2.22)

*Latency 180 day analyses: starting follow-up from 180 days after index time; latency 365 day analyses: starting follow-up from 365 days after index time

†IR=incidence rate per 1000 person years.

‡Adjusted for high dimension propensity score.

§P<0.05.