Allele frequencies

ADHDn (%)

Controln (%)

p-value

G

A

Total

205

195

400

94

104

198

0.472

Genotype frequencies

n (%)

n (%)

p-value

G/G

G/A

A/A

Total

50

105

45

200

22

51

26

99

0.734

Presence or absence of G and A alleles

n (%)

n (%)

p-value

G/G + G/A

155 (77.5%)

73 (73.7%)

0.472

A/A + G/A

150 (75%)

77 (77.7%)

0.597