Incidence and Characteristics of Total Stroke in the United States

BMC Neurology

Table 1 US Estimates of Number of Hospitalized Strokes by ICD-9-CM Code for Principal or Secondary Diagnoses

ICD-9	Definition	Estimated PPV^a	Weighted count	US Estimate	US Estimate
			in 1996	in 1996	in 1995^b
430	Subarachnoid hemorrhage	39/47 = 83%	28,604	23,735	23,389
431	Intracerebral hemorrhage	86/101 = 85%	87,072	74,141	71,582
432	Other and unspecified	1/24 = 4%	26,129	1,089	1,031
	intracranial hemorrhage
433	Occlusion and stenosis of	91/607 = 15%	368,864	55,299	51,371
	precerebral arteries
434	Occlusion of cerebral arteries	573/701 = 82%	460,173	376,147	353,493
435	Transient cerebral ischemia	43/351 = 12%	257,384	31,531	29,555
436	Acute but ill-defined	230/318 = 72%	181,842	131,521	133,278
	cerebrovascular disease
437	Other and ill-defined	11/134 = 8%	140,678	11,548	11,328
	cerebrovascular disease
438	Late effects of cerebrovascular	5/360 = 1%	531,259	7,379	6,975
	disease
	Estimated number of			712,390	682,002
	hospitalized strokes

^aThe estimated PPV values are taken from Williams et al[8], TABLE 1. ^bThe US estimates in 1995 are taken from Williams et al [8], TABLE 2.

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