Table 1:
Baseline demographics and characteristics of the two study groups
| Variable | No IVUS | IVUS | P value |
|---|---|---|---|
| Number | 1,771,390 | 105,787 | |
| Age | 73.3±9.4 | 73±9.3 | <0.01 |
| Male sex | 60.1% | 60.0% | 0.6 |
| Black race | 8.3% | ||
| Diabetes mellitus | 38.4% | 38.7% | 0.04 |
| Hypertension | 80.1% | 82.5% | <0.001 |
| History of heart failure | 25.8% | 28.6% | <0.001 |
| Prior coronary artery disease | 21.8% | 22.8% | <0.001 |
| Prior revascularization | 19.2% | 20.1% | <0.001 |
| Prior bleeding | 4.7% | 5.3% | <0.001 |
| Prior GI bleed | 2.4% | 2.6% | <0.001 |
| Prior cerebral bleed | 0.2% | 0.2% | 0.8 |
| Prior ischemic stroke | 4.2% | 5.1% | <0.001 |
| Prior smoking | 24.4% | 25.8% | <0.001 |
| Pulmonary hypertension | 3.9% | 4.8% | <0.001 |
| Peripheral arterial disease | 14.4% | 16.4% | <0.001 |
| Liver disease | 1.4% | 1.8% | <0.001 |
| Chronic kidney disease | 19.3% | 21.1% | <0.001 |
| Prior permanent pacemaker | 3.4% | 3.8% | <0.001 |
| Prior intracardiac defibrillator | 1.9% | 2.4% | <0.001 |
| Preexisting atrial fibrillation | 15.4% | 16.8% | <0.001 |
| Sleep apnea | 7.5% | 9.4% | <0.001 |
| Underweight | 2.1% | 2.3% | <0.0001 |
| Obesity | 13.7% | 15.2% | <0.001 |
| Hypothyroid | 12.5% | 14.1% | <0.001 |
| Anemia deficiency | 13.8% | 15.9% | <0.001 |
| Rheumatoid arthritis and other connective tissue disease | 2.8% | 3.3% | <0.001 |
| Coagulopathy | 3.8% | 4.7% | <0.001 |
| Tumor without metastasis | 1.6% | 1.7% | 0.1 |
| Lung disease | 20.9% | 22.9% | <0.001 |
| Electrolytes abnormality | 16.9% | 18.4% | <0.001 |
| Depression | 7.3% | 8.5% | <0.001 |