Table 1.
Characteristics of 8,325 patients (6,405 in high-severity and 1,920 in low-severity) registered for isolated coronary artery bypass surgery in British Columbia, 1991–2000
| Characteristic | All patients N (%) | High-severity N (%) | Low-severity N (%) |
| Age group (y) | |||
| <50 | 679 (8.2) | 496 (7.7) | 183 (9.5) |
| 50–59 | 1841 (22.1) | 1397 (21.8) | 444 (23.1) |
| 60–69 | 3167 (38.0) | 2457 (38.4) | 710 (37.0) |
| 70–79 | 2478 (29.8) | 1933 (30.2) | 545 (28.4) |
| ≥80 | 160 (1.9) | 122 (1.9) | 38 (2.0) |
| Sex | |||
| Women | 1473 (17.7) | 1102 (17.2) | 371 (19.3) |
| Men | 6852 (82.3) | 5303 (82.8) | 1549 (80.7) |
| Comorbidity at registration | |||
| Major conditions* | 1775 (21.3) | 1358 (21.2) | 417 (21.7) |
| Other conditions † | 2137 (25.7) | 1723 (26.9) | 414 (21.6) |
| None | 4413 (53.0) | 3324 (51.9) | 1089 (56.7) |
| Coronary anatomy | |||
| Left-main stenosis | 990 (11.9) | 990 (15.5) | 0 (0.0) |
| Multi- vessel disease‡ | 6672 (80.1) | 4986 (77.8) | 1686 (87.8) |
| Limited disease§ | 663 (8.0) | 429 (6.7) | 234 (12.2) |
*congestive heart failure, diabetes, chronic obstructive pulmonary disease, rheumatoid arthritis, cancer.
†peripheral vascular disease, cerebrovascular disease, dementia, peptic ulcer disease, hemiplegia, renal disease, or liver disease.
‡3 or 2-vessel disease with PLAD.
§2-vessel disease with no PLAD or 1-vessel disease with PLAD