Table 2 Genotypes and phenotypes of α-thalassemia cases

--^SEA/ αα

Deletional Mutation

α-thalassemia trait

8 (1.3)

- α^3.7/ α^TSaudiα

Deletional and Non-deletional Mutation

α-thalassemia trait

41 (6.6)

- α^3.7/α^IVS1(−5nt)α

Deletional and Non-deletional mutation

α-thalassemia trait

11 (1.8)

α^{IVS1 (−5nt)}α/ α^TSaudiα

Non-deletional mutations

α-thalassemia trait

13 (2.1)

- α^3.7/ - α^4.2α

Deletional mutation

α-thalassemia trait

1 (0.2)

--^MED/α^TTurkishα

Deletional and Non-deletional Mutation

HbH disease

1 (0.2)

- α^3.7/- α^3.7

Deletional mutation

α-thalassemia trait

163 (26.1)

- α^3.7/ αα

Deletional mutation

Silent carrier

124 (19.8)

α^TSaudiα/α^TSaudiα

Non-deletional mutation

α-thalassemia trait

14 (2.2)

α^TSaudiα / αα

Non-deletional mutation

Silent carrier

31 (5)

α^{IVS1 (−5nt)}α / α^{IVS1 (−5nt)}α

Non-deletional mutation

α-thalassemia trait

7 (1.1)

α^{IVS1 (−5nt)}α / αα

Non-deletional Mutation

Silent carrier

129 (20.6)

--^MED/αα

Deletional Mutation

Alpha-thal trait

13 (2.1)

No Mutation Detected

69 (11.0)

Total

625 (100)