Table 2.
Characteristics of 7316 wait-listed patients who underwent isolated coronary artery bypass surgery in British Columbia 1991–2001.
| Characteristic | Early surgery, N (%) | Late surgery, N (%) |
| Age group (yr) | ||
| 40–49 | 223 (8.3) | 375 (8.1) |
| 50–59 | 552 (20.6) | 1075 (23.2) |
| 60–69 | 1021 (38.2) | 1772 (38.2) |
| 70–79 | 830 (31.0) | 1348 (29.0) |
| 80 and over | 49 (1.8) | 71 (1.5) |
| Sex | ||
| Female | 482 (18.0) | 791 (17.0) |
| Male | 2193 (82.0) | 3850 (83.0) |
| Urgency at registration | ||
| Semi-urgent | 2107 (78.8) | 3685 (79.4) |
| Non-urgent | 568 (21.2) | 956 (20.6) |
| Comorbidity at registration | ||
| Major conditions* | 603 (22.5) | 926 (20.0) |
| Other conditions† | 785 (29.3) | 1096 (23.6) |
| None | 1287 (48.1) | 2619 (56.4) |
| Affected anatomy | ||
| Left main | 403 (15.1) | 505 (10.9) |
| Multi-vessel‡ | 2054 (76.8) | 3809 (82.1) |
| Limited§ | 218 (8.1) | 327 (7.0) |
| Period of registration | ||
| 1991–1992 | 633 (23.7) | 710 (15.3) |
| 1993–1994 | 687 (25.7) | 851 (18.3) |
| 1995–1996 | 354 (13.2) | 1122 (24.2) |
| 1997–1998 | 450 (16.8) | 1058 (22.8) |
| 1999–2000 | 551 (20.6) | 900 (19.4) |
| Hospital | ||
| 1 | 662 (24.7) | 831 (17.9) |
| 2 | 1004 (37.5) | 1507 (32.5) |
| 3 | 390 (14.6) | 1270 (27.4) |
| 4 | 619 (23.1) | 1033 (22.3) |
| Mode of admission | ||
| Elective | 2524 (94.4) | 4526 (97.5) |
| Unplanned emergency | 151 (5.6) | 115 (2.5) |
* Congestive heart failure, diabetes mellitus, chronic obstructive pulmonary disease, cancer, or rheumatoid arthritis.
†Peripheral vascular disease, cerebrovascular disease, dementia, peptic ulcer disease, hemiplegia, renal disease, or liver disease.
‡Three- or two-vessel disease with stenosis of the proximal left anterior descending artery.
§Two-vessel disease with no lesion in the proximal left anterior descending artery or single-vessel disease with stenosis of the proximal left anterior descending artery.