- Genotypes of hemoglobin constant spring (N=389).
| Types and coinheritance | n (%) |
|---|---|
| Heterozygous Hb CS | 359 (92.2) |
| Homozygous Hb CS | 2 (0.5) |
| Compound heterozygous Hb CS | |
| Heterozygous alpha 3.7 | 17 (4.3) |
| Heterozygous alpha 4.2 | 3 (0.7) |
| Haemoglobin adana | 2 (0.5) |
| Heterozygous IVS-1 | 1 (0.3) |
| Heterozygous alpha SEA | 1 (0.3) |
| Haemoglobin Quang Sze | 1 (0.3) |
| Haemoglobin Malay | 1 (0.3) |
| Beta thalassemia trait | 1 (0.3) |
| Haemoglobin D Punjab | 1 (0.3) |
Values are presented as numbers and percentages (%).
Hb CS: hemoglobin constant spring, IVS-1: intervening sequence-1, SEA: Southeast Asian