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Table 1 Baseline characteristics in the Department of Veterans Affairs and National Hospital Discharge Survey

From: Changes in the use of coronary artery revascularization procedures in the Department of Veterans Affairs, the National Hospital Discharge Survey, and the Nationwide Inpatient Sample, 1991–1999

  CABS PCI
Variable VA (n = 58,807) NHDS (n = 16,540) NIS-1997 (n = 54,218) VA (n = 51,509) NHDS (n = 21,635) NIS-1997 (n = 77,653)
Age 64 ± 9 64 ±11 65 ±10 62 ±10 61 ±12 62 ± 12
20–34 < 1% < 1% < 1% < 1% 1% 1%
35–49 9% 10% 9% 15% 17% 16%
50–64 43% 39% 36% 44% 41% 39%
65–74 38% 35% 36% 31% 28% 29%
75+ 11% 16% 19% 10% 13% 16%
Race       
White 83% 67% 70% 82% 64% 71%
Black 7% 3% 3% 9% 4% 3%
Other 5% 4% 7% 5% 5% 7%
Unknown 5% 25% 20% 4% 27% 19%
Geographic region       
Northeast 14% 18% 25% 11% 16% 25%
Midwest 21% 33% 21% 23% 33% 22%
South 42% 33% 36% 48% 33% 36%
West 22% 17% 17% 18% 18% 16%
  1. CABS-coronary artery bypass graft surgery PCI-percutaneous coronary intervention VA-Veterans Affairs NHDS National Hospital Discharge Survey NIS Nationwide Inpatient Sample from the Healthcare Cost and Utilization Project