Table 3.
Baseline Characteristics of the Propensity Matched Cohort
| Medical therapy patients | Revascularized patients | |
|---|---|---|
| n = 12,362 | n = 12,362 | |
| Treatment | ||
| CABG | 0.0 | 25.0 |
| PCI | 0.0 | 75.0 |
| Medical therapy | 100.0 | 0.0 |
| Demographics | ||
| Mean age, yrs | 66.47(10.27) | 66.55 (10.19) |
| Male gender | 74.2 | 73.6 |
| Rural | 14.5 | 14.5 |
| Income* | ||
| 1 | 19.4 | 19.4 |
| 2 | 20.4 | 21.0 |
| 3 | 20.3 | 20.0 |
| 4 | 20.2 | 20.3 |
| 5 | 19.6 | 19.3 |
| Medical comorbidities | ||
| PVD | 10.3 | 10.2 |
| Previous MI | 31.6 | 31.4 |
| COPD | 7.6 | 7.7 |
| Malignancy | 3.6 | 3.6 |
| Mean Charlson score | 0.94 (1.35) | 0.94 (1.39) |
| Cardiac risk factors | ||
| Diabetes | 46.4 | 46.1 |
| Hypertension | 88.3 | 89.2 |
| Hyperlipidemia | 81.8 | 82.2 |
| History smoking | 32.2 | 32.0 |
| Cardiac status/testing | ||
| Native stenosis† | ||
| LM | 10.8 | 10.4 |
| Prox LAD | 28.3 | 27.6 |
| Mid/distal LAD | 47.9 | 48.0 |
| Circumflex | 50.1 | 49.7 |
| RCA | 59.5 | 59.5 |
| Had previous CABG | ||
| Yes | 20.2 | 19.1 |
| No | 79.7 | 80.9 |
| Unknown | 0.1 | 0.0 |
| LV function | ||
| ≤ 34 % | 6.1 | 5.9 |
| 35–49 % | 14.7 | 14.7 |
| ≥ 50 % | 48.8 | 49.2 |
| NA | 30.5 | 30.2 |
| Exercise ECG risk | ||
| High risk | 23.7 | 22.6 |
| Low risk | 23.4 | 23.7 |
| Uninterpretable | 4.9 | 4.8 |
| NA | 48.0 | 48.9 |
| Functional imaging risk | ||
| High risk | 31.8 | 31.8 |
| Low risk | 24.4 | 25.3 |
| Unknown/NA | 43.8 | 42.9 |
| CCS class | ||
| 0 | 18.9 | 19.6 |
| 1 | 15.5 | 15.6 |
| 2 | 37.6 | 36.9 |
| 3 | 25.6 | 25.5 |
| 4 | 2.5 | 2.4 |
| Physician-level factors: Referral Physician | ||
| Specialty | ||
| Cardiology | 40.3 | 42.1 |
| Internal medicine | 9.5 | 9.6 |
| GP/FP | 26.8 | 24.7 |
| Hospital-level factors | ||
| Mean Annual Cath volume | 4,059.82 | 4,068.44 |
| Hospital type | ||
| Cath only | 13.1 | 14.3 |
| PCI and Cath only | 7.0 | 5.9 |
| CABG, PCI and Cath | 79.9 | 79.9 |
All covariates are presented as percentages, with the exception of mean values
CABG coronary artery bypass grafting; COPD chronic obstructive pulmonary disease; MI myocardial infarction; PCI percutaneous coronary intervention, PVD peripheral vascular disease; LM left main, LAD left anterior descending, RCA right coronary artery, LV left ventricular, ECG electrocardiogram, CCS Canadian Cardiovascular Society, Cath catheterization, GP/FP general practitioner/family practitioner. *Income quintile: 1 = lowest, 5 = highest; † LM if ≥ 50 % stenosis, Prox LAD if ≥ 70 % stenosis, Mid/distal LAD if ≥ 70 % stenosis, Circumflex if ≥ 70 % stenosis, RCA if ≥ 70 % stenosis