Comparison among the three groups as regards risk factors and drug treatment, by χ2 test then one-way analysis of variance
| Risk factors and drug therapy | Group 1a (n=46) | Group 1b (n=54) | Control group (n=50) | P value | |
| Male gender | n | 32 | 37 | 29 | 0.06 |
| % | 69.9 | 68.5 | 58.0 | ||
| Smoking | n | 31 | 30 | 22 | 0.4 |
| % | 67.4 | 55.6 | 44.0 | ||
| Hypertension | n | 27 | 20 | 0 | 0.4 |
| % | 57.8 | 37.9 | 0.0 | ||
| Obesity (BMI >30 kg/m²) | n | 36 | 32 | 30 | 0.126 |
| % | 78.3 | 59.3 | 60 | ||
| Aspirin | n | 25 | 10 | 0 | 0.2 |
| % | 54.3 | 18.5 | 0.0 | ||
| Beta blocker | n | 40 | 8 | 3 | 0.6 |
| % | 87.0 | 14.8 | 6.0 | ||
| ACEI | n | 38 | 12 | 8 | 0.7 |
| % | 82.6 | 22.2 | 16.0 | ||
| Statin | n | 33 | 39 | 8 | 0.9 |
| % | 71.7 | 72.2 | 16.0 | ||
| Diuretics | n | 19 | 1 | 0 | 0.11 |
| % | 41.3 | 1.9 | 0.0 | ||
ACEI, ACE inhibitor; BMI, body mass index.