Number of annual births and existing patients with thalassemia syndromes.
| Disease . | No. of couples at risk/yr . | No. of births/yr . | No. of existing patients . |
|---|---|---|---|
| Hb Bart's hydrops fetalis | 5,000 | 1,250 | 0 |
| Hb H disease | 28,000 | 7,000 | 420,000 |
| Homozygous β-thalassemia | 2,500 | 625 | 6,250 |
| Hb E β-thalassemia | 13,000 | 3,250 | 97,500 |
| Total | 48,500 | 12,125 | 523,750 |
| Disease . | No. of couples at risk/yr . | No. of births/yr . | No. of existing patients . |
|---|---|---|---|
| Hb Bart's hydrops fetalis | 5,000 | 1,250 | 0 |
| Hb H disease | 28,000 | 7,000 | 420,000 |
| Homozygous β-thalassemia | 2,500 | 625 | 6,250 |
| Hb E β-thalassemia | 13,000 | 3,250 | 97,500 |
| Total | 48,500 | 12,125 | 523,750 |