Table 1.

Allele frequencies of CYP1A2, CYP2C9, CYP2C19, CYP2D6 and CYP3A5(n=1017).

Gene	Variant allele	This study	Japanese28)	Caucasian28)
CYP1A2	*1C	0.234	0.319	0.010a
CYP2C9	*3	0.027	0.035	0.056a
CYP2C19	*2	0.295	0.345	0.136a
	*3	0.111	0.090	0.000a
CYP2D6	*10	0.427	0.435	0.196a
CYP3A5	*3	0.762	0.780	0.955a

^a Significantly different (P< 0.05) mean allelic frequency compared with this study mean (Pearson's chi-square test).