Table 3.
Demographics of Study Populations
| CABG | PTCA | CEA | AAA | THR | AMI | CVA | |
|---|---|---|---|---|---|---|---|
| Age, mean (SD) | 66 (11) | 65 (12) | 72 (9) | 73 (8) | 72 (14) | 69 (14) | 73 (13) |
| Male (%) | 72 | 67 | 57 | 79 | 35 | 61 | 44 |
| Number of diagnoses, median (IQR) | 6 (4,8) | 5 (3,7) | 5 (3,6) | 6 (4,8) | 4 (2, 6) | 6 (4,8) | 6 (5,9) |
| Mortality rate (%) | 3.0 | 1.6 | 0.88 | 12.5 | 1.13 | 8.9 | 6.4 |
| Hospital volume,* median (IQR) | 509 (298,826) | 734 (68,1514) | 65 (20,167) | 17 (6,44) | 131 (57,287) | 319 (117,665) | 254 (106,482) |
*
Hospital volume calculated for period of 1998–2000
SD, standard deviation; IQR, interquartile range; CABG, coronary artery bypass graft surgery; PTCA, coronary angioplasty; CEA, carotidendarterectomy; AAA, abdominal aortic aneurysm surgery; THR, total hip replacement; AMI, acute myocardial infarction; CVA, stroke.