Table 1. Baseline socio-demographic and clinical characteristics of patients with prosthetic heart valves on oral anticoagulation therapyh.
| Characteristics | Frequency | Percentage |
| Gender | ||
| Female | 42 | 57.5 |
| Male | 31 | 42.5 |
| Age categories at surgery (years) | ||
| 11–15 | 12 | 16.4 |
| 16–20 | 29 | 39.7 |
| 21–25 | 32 | 43.8 |
| Residence | ||
| Urban | 63 | 86.3 |
| Semi-urban | 9 | 12.3 |
| Rural | 1 | 1.4 |
| NYHA functional class (before surgery) | ||
| I | ||
| II | 12 | 16.4 |
| III | 29 | 39.7 |
| IV | 32 | 43.8 |
| Indications for valve replacement (type of valve lesion) | ||
| Severe MR | 16 | 21.9 |
| Severe MS | 13 | 17.8 |
| Severe AR | 4 | 5.5 |
| Multi-valvular lesions | 40 | 54.8 |
MR: mitral regurgitation; MS: mitral stenosis; AR: aortic regurgitation.h