Table 1.
Patient’s preoperative clinical characteristics
| Variable | n (%) or mean (SD) |
| Total patients | 552 |
| Women | 132 (24%) |
| Age (years) | 63.8 (11) |
| Range (years) | 38–77 |
| Diabetes | 126 (23%) |
| Hypertension | 333 (60%) |
| Smoking | 414 (75%) |
| Dyslipidaemia | 204 (37%) |
| Hypercholesterolaemia | 38 (7%) |
| Chronic renal failure (creatinine >133 μmol/l) | 21 (4%) |
| Cerebral ischaemia | 15 (2.7%) |
| Peripheral vascular disease | 33 (6%) |
| Chronic obstructive pulmonary disease | 51 (9.3%) |
| NYHA functional class | 1.5 (0.8) |
| Canadian Cardiovascular Society class | 3.3 (0.7) |
| Stable angina | 220 (40%) |
| Unstable angina | 193 (35%) |
| Silent angina | 36 (6.6%) |
| Prior myocardial infarction | 253 (46%) |
| Prior coronary angioplasty | 117 (21%) |
| Heavily calcified aorta | 33 (6%) |
| Previous saphenectomy or varicose saphenous vein | 38 (7%) |
| Coronary angiography data | |
| Three vessel disease | 351 (63.7%) |
| Two vessel disease | 200 (36.3%) |
| Left main coronary artery stenosis | 143 (26%) |
| LVEF <35% | 117 (21%) |
| NYHA class >III | 108 (19.7%) |
| Left ventricular ejection fraction (%) | 49 (14) |
LVEF, left ventricular ejection fraction; NYHA, New York Heart Association.