Table 2.

Distribution of β-thalassemia genotypes in Quanzhou region of Southeast China

Types	Genotypes	Cases	Frequency	Class
Heterozygote	βIVS−II−654/βN	259	36.02%	Common
	βCD41–42/βN	187	26.01%	Common
	βCD17/βN	141	19.61%	Common
	βCD26/βN	41	5.70%	Common
	β−28/βN	25	3.48%	Common
	βCD27/28/βN	15	2.09%	Common
	βCD71–72/βN	5	0.70%	Common
	βCD43/βN	5	0.70%	Common
	βCAP+40–43βN	3	0.42%	Common
	βInt/βN	3	0.42%	Common
	βIVS−I−1/βN	2	0.28%	Common
	βCD14–15/βN	2	0.28%	Common
	SEA-HPFH	5	0.70%	Rare
	Hb Lepore-Boston-Washington	4	0.56%	Rare
	βIVS−II−806/βN	3	0.42%	Rare
	Chinese Gγ+(Aγδβ)0	2	0.28%	Rare
	βCD53/βN	2	0.28%	Rare
	βIVS−II−672/βN	2	0.28%	Rare
	βCD15/βN	1	0.14%	Rare
	βCD54–58/βN	1	0.14%	Rare
	Filipino(~ 45 kb deletion)	1	0.14%	Rare
	βIVS−II−761/βN	1	0.14%	Rare
	βIVS−II−180/βN	1	0.14%	Rare
	Hb Lepore-Quanzhou	1	0.14%	Novel
Compound heterozygote	βIVS−II−654/βIVS−II −654	2	0.28%	Common
	βCD41–42/βCD41–42	1	0.14%	Common
	βCD26/β−28	1	0.14%	Common
	βIVS−II−654M/β−28	1	0.14%	Common
	βCD41–42/βCD17	1	0.14%	Common
	βCD41–42/β−28	1	0.14%	Common
	Total	719	100.00%	/