Table 4. Allele frequencies found in the studied population compared to allele frequencies of populations in the HapMap study (Caucasian and African origins). Ribeirão Preto, SP, Brasil, 2016.

Polymorphism	Alele	n*	RP(%)†	CEU(%)‡	YRU(%)§	Pa‖	Pb¶
CYP2C9 * 2 (rs1799853)	*1	119	88.8	89.6	100	-	-
	*2	15	11.1	10.4	0	0.818	<0.001* *
CYP2C9 * 3 (rs1057910)	*1	124	92.5	94.2	100	-	-
	*3	10	7.5	5.8	0	0.774	0.007* *

^*n = Values in number of observations;

^†RP = Population of Ribeirão Preto, São Paulo;

^‡CEU = caucasian europeans - population of Caucasian origin composed of descendants of Europeans who inhabit the Utah region in the United States (USA);

^§YRU = Yorubans - population of African origin from the Yoruba ethnic group, inhabitants of Ibadan, Nigeria;

^‖Pa = p-value of the comparison between populations RP vs. CEU;

^¶Pb = p-value of the comparison between populations RP vs. YRU;

^**Statistically significant