Table 1.

Distribution and total number of hospitals and patients* by hospital volume and year

	PCI				CABG
	Hospital Volume				Hospital Volume
	< 200	200–399	400+	Total #	< 200	200–449	450+	Total #
Hospitals
1988–1991	41.0%	32.7%	26.3%	806	36.0%	42.1%	21.9%	773
1992–1996†	25.5%	28.0%	46.5%	874†	28.4%	42.5%	29.1%	829†
1997–2000	24.8%	22.4%	52.8%	841	27.6%	39.8%	32.6%	753
Patients
1998–1991	12.9%	29.7%	57.4%	1.03 million	11.3%	39.2%	49.4%	1.06 million
1992–1996†	5.4%	17.5%	77.2%	2.03 million†	7.9%	33.8%	58.2%	1.67 million†
1997–2000	4.2%	11.9%	83.9%	1.90 million	7.9%	29.5%	62.6%	1.27 million

*The data are weighted so that they are representative of the US population.

^†The middle time period is based on five years of data; other time periods contain data from four years.