Table 3.

Comparison of allele frequencies of CYP2C19 reported from different ethnic populations.

		Frequency (P value vs Egyptians)
Population	n	*1	*2	*3	Reference
Egyptians	494	0.888	0.110	0.002	Present study
Caucasians
American	210	0.871	0.129 (NS)	0 (NS)	[35]
Canadian (Inuit)	304	0.890	0.110 (NS)	0 (NS)	[36]
Danish	478	0.839	0.161 (0.0200)	0 (NS)	[37]
Swedish	166	0.849	0.144 (NS)	0.007 (NS)	[38]
German	280	0.850	0.150 (NS)	0 (NS)	[39]
Portuguese	306	0.870	0.130 (NS)	0 (NS)	[40]
Australian	198	0.854	0.146 (NS)	0 (NS)	[41]
Saudi Arabia	194	0.850	0.150 (NS)	0 (NS)	[35]
Asians
Japanese	106	0.670	0.230 (0.0022)	0.104 (<0.0001)	[35]
Korean	206	0.675	0.209 (0.0008)	0.116 (<0.0001)	[42]
Chinese-Taiwanese	236	0.630	0.320 (<0.0001)	0.055 (<0.0001)	[35]
Filipino	104	0.540	0.390 (<0.0001)	0.077 (<0.0001)	[35]
South-west Asia
North Indian	242	0.700	0.300 (<0.0001)	0 (NS)	[43]
Africans
Bantu-Tanzanian	502	0.815	0.179 (0.0021)	0.006 (NS)	[42]
Ethiopian	228	0.846	0.136 (NS)	0.018 (0.0400)	[44]
Venda	304	0.783	0.217 (<0.0001)	0 (NS)	[45]
Zimbabwean	336	0.869	0.131 (NS)	0 (NS)	[45]
African-Americans	216	0.750	0.250 (<0.0001)	0 (NS)	[35]

n, total number of alleles.

Differences in allele frequencies were measured by Fisher exact test.

NS indicates that there were no significant differences (P>0.05).