Table 1.

Results of Hb analysis of 1,592 at-risk couples, classified into 6 different groups and the diseases at-risk for the fetuses

Group	Results of Hb analysis		Diseases at-risk	No.	%
	Husband/Wife	Husband/Wife
1	A2A; Hb A2>3.5%	EA; Hb E>25%	a	1,544	96.9
2	A2A; Hb A2>3.5%	EA; Hb E≤25%	a, b	29	1.8
3	A2A; Hb A2>3.5%	EE	a, b	9	0.6
4	EF	EA; Hb E≤25%	a, b	4	0.3
5	EF	EE	a, b	3	0.2
6	A2A; Hb A2>3.5%	EF, EE/EF	a, b, c	3	0.2
	Total			1,592	100

A: Hb E-β⁰-thalassemia disease; b: Homozygous α⁰-thalassemia, and c: Homozygous β⁰-thalassemia.