Table 1.

Distribution of Genotypes among the Tourette Syndrome Patients and Healthy Control Subjects

Tourette syndrome patients n (%)		Normal controls n (%)	P a
Genotype			0.026
A/A	8 (10.96)	13 (8.22)
A/G	34 (46.58)	48 (30.38)
G/G	31 (42.47)	97 (61.39)
Allelic frequency			0.015
Allele A	50 (34.25)	74 (23.42)
Allele G	96 (65.75)	242 (76.58)

^a P values were calculated by χ ² test.