Table 5.

Allele frequencies of SULT1A1 in various ethnic groups.

		Allele frequency
Population	n	*Arg	*His	P vs. Egyptian	Reference
Egyptians†	200	0.865	0.135		Present study
Caucasians
American‡	150	0.690	0.310	<0.0001	[14]
American‡	245	0.670	0.330	<0.0001	[41]
German†	300	0.630	0.370	<0.0001	[21]
British†	106	0.680	0.320	<0.0001	[40]
Scottish†	187	0.680	0.320	<0.0001	[40]
Asians
Chinese‡	290	0.914	0.080	0.0018	[41]
Africans
Nigerian†	52	0.730	0.270	0.0031	[40]
African-Americans‡	70	0.710	0.290	<0.0001	[41]

n, Number of subjects. (Differences in allele frequencies were measured using Fisher's exact test.)

^†These studies were designed to detect only SULT1A1*2, so carriers of *3 or *4 alleles may be scored as carriers of SULT1A1*1 or *2.

^‡These studies were designed to detect either *2 and *3 or *2,*3and*4. For this table, the common allele SULT1A1*1 and the rare alleles *3 and *4 were combined with the allele SULT1A1*1 and assigned as *Arg.