Echocardiographics findings of the study populations
| Variable (N, %) | Screening (n=299) | Referral (n=705) | P values |
| Significant heart disease | 70 (23.4%) | 284 (40.3%) | <0.001 |
| LV dilatation (moderate/severe) | 14 (4.8%) | 45 (6.4%) | 0.38 |
| LV dysfunction (moderate/severe) | 12 (4.1%) | 57 (8.1%) | 0.03 |
| LV hypertrophy (moderate/severe) | 24 (8.3%) | 78 (11.2%) | 0.21 |
| LV segmental abnormality | 0 | 0 | – |
| Mitral regurgitation (moderate/severe) | 26 (8.9%) | 142 (20.3%) | <0.001 |
| Mitral stenosis | 9 (3.1%) | 17 (2.4%) | 0.52 |
| Aortic regurgitation (moderate/severe) | 22 (7.5%) | 111 (15.8%) | <0.001 |
| Aortic stenosis | 16 (5.4%) | 30 (4.3%) | 0.51 |
| Tricuspid regurgitation | 10 (3.5%) | 87 (12.6%) | <0.001 |
| RV dilatation (moderate/severe) | 1 (0.4%) | 30 (4.4%) | <0.001 |
| RV dysfunction (moderate/severe) | 0 | 0 | – |
*P<0.05.
LV, left ventricle; RV, right ventricle.