Prevalence of left valvular diseases
| No | Mild | Moderate | Severe | |
| Mitral stenosis (%/n) | 58.6/41 | 11.4/8 | 20/14 | 9.5/7 |
| Aortic stenosis (%/n) | 71.4/50 | 18.5/13 | 7.1/5 | 2.8/2 |
| Mitral regurgitation (%/n) | 25.7/18 | 32.8/23 | 17.0/12 | 24/17 |
| Aortic regurgitation (%/n) | 38.57/27 | 37.14/26 | 18.57/13 | 10.0/4 |