Registrant demographics preregistry and postregistry expansion
| Pre-expansion (n=845) | Postexpansion (n=362) | P value | |
| Enrolment age range, mean±SD | 3–78 years 28±15 years | 4–76 years 25±16 years | <0.01 |
| Gender (% female) | 71.5 | 69.3 | 0.43 |
| Rheumatic heart disease severity score | n=837 | n=356 | |
| Mild (%) | 9 | 12.4 | 0.20 |
| Moderate (%) | 16.6 | 14.9 | |
| Severe (%) | 74.4 | 72.7 |