Baseline characteristics of the New Zealand case series compared with a contemporary Canadian case series
| 1994–95 Christchurch, New Zealand (n = 324) | Ontario, Canada14 (n = 8213) | |
|---|---|---|
| Women | 27% | 22% |
| Previous CABG | 6% | – |
| Previous PTCA | 11% | – |
| Previous myocardial infarction | 54% | – |
| History of hypertension | 49% | – |
| History of diabetes mellitus | 15% | – |
| Age | ||
| Median (years) | 63 (57–68) | 63 |
| < 65 years | 55% | 58% |
| 65–74 years | 39% | 35% |
| ⩾ 75 years | 6% | 7% |
| Severity of disease | ||
| LM > 50% diameter | 23% | 15% |
| PLAD +2–3 VD | 48% | 68% |
| 3 VD, no PLAD | 18% | 10% |
| 1–2 VD, no PLAD | 10% | 4% |
| IVD with PLAD | 0.3% | 3% |
| LV function (n = 315) | ||
| > 50% | 75% | – |
| 35–50% | 18% | – |
| < 35% | 7% | – |
| Severity of angina | ||
| I/II | 16% | 21% |
| III | 45% | 40% |
| IV | 39% | 39% |
| Result of stress testing | ||
| Extremely positive/very positive | 46% | 52% |
| Positive/mildly positive | 18% | 9% |
| Negative | 2% | |
| Not done/unknown | 34% | 39% |
| Ontario score | ||
| Median | 5.25 | – |
| Score ⩽ 5 | 42% | 36% |
| Score ⩽ 3 | 17% | 8% |
| New Zealand score | ||
| Median | 46 | – |
| Score > 75 | 17% | – |
| Score > 50 | 43% | – |
| Medication use (n (%)) | ||
| Aspirin | 292 (90) | – |
| β Blocker | 260 (80) | – |
| Calcium antagonist | 229 (71) | – |
| Long acting nitrate | 234 (72) | – |
| Any 2 of β blocker, calcium antagonist, nitrate | 264 (81) | – |
| ACE inhibitor | 111 (34) | – |
| Diuretic | 71 (22) | – |
| Lipid lowering agent | 112 (35) | – |
| Cholesterol (median, IQ range) (n = 298) | ||
| Total cholesterol (mmol/l) | 5.8 (5.2–6.7) | |
| HDL cholesterol (mmol/l) | 0.96 (0.8–1.1) | |
| Total:HDL cholesterol | 6.3 (5.2–7.3) | |
| BMI (median, IQ range) (n = 310) | 27.1 (24.9–29.4) | |
| Smoking (n (%)) (n = 315) | ||
| Current, ex < 1 month | 42 (13) | |
| Ex < 1 year | 29 (9) | |
| Ex > 1 year | 159 (51) | |
| Never | 77 (27) | |
CABG, coronary artery bypass grafting; PTCA, percutaneous transluminal coronary angioplasty; LM, left main coronary artery; PLAD, proximal left anterior descending artery; VD, vessel disease (> 50% dimater stenosis); LV left ventricular; BMI, body mass index (weight/height2); ACE, angiotensin converting enzyme; IQ, interquartile; HDL, high density lipoprotein.