TABLE 2.

Genotype frequencies.

	Boys			Girls
	Major/Major homozygote	Heterozygote	Minor/Minor homozygote	Major/Major homozygote	Heterozygote	Minor/Minor homozygote
COMT rs4680	GG; Val/Val 3 (11.1%)	GA; Val/Met 20 (74.1%)	AA; Met/Met 4 (14.8%)	GG; Val/Val 5 (19.2%)	GA; Val/Met 8 (30.8%)	AA; Met/Met 13 (50.0%)
BDNF rs6265	CC; Val/Val 9 (33.3%)	CT; Val/Met 18 (66.7%)	TT not represented	CC; Val/Val 4 (15.4%)	CT; Val/Met 22 (84.6%)	TT not represented

Frequency is represented in number of participants and percent of participants. For BDNF, the minor homozygous Met/Met genotype was not represented in our sample.