Types of sickle cell disease
| Condition | Freq. | (%) |
| Hb SS | 853 | (64.8) |
| Hb SC | 366 | (27.8) |
| Hb S/β+ thalassaemia | 62 | (4.7) |
| Hb S/HPFH | 21 | (1.6) |
| Hb S/β°thalassaemia | 8 | (0.6) |
| Other sickle type diseases | 5 | (0.4) |
| Hb S/δβ thalassaemia | <5 | – |
| Total | 1317 | (100.0) |
Figures are frequencies (column percentages). Other sickle type diseases include: Hb S/E, Hb S/Lepore and Hb S/Dpunjab. Percentages not shown for variants with frequency <5.