Table 3 Frequencies of genotype and allele of SLC6A3 and DRD 2 gene polymorphisms in disfluent speech patients and controls

From: Association between dopaminergic genes (SLC6A3 and DRD2) and stuttering among Han Chinese

Polymorphism Patients, n (%) Controls, n (%) χ2 P OR (95% CI)
rs2617604
Alleles
C 223 (99.6) 223 (99.6)   1.000a 1.000 (0.062–16.088)
T 1 (0.4) 1 (0.4)    
Genotypes
CC 111 (99.1) 111 (99.1)   1.000a 1.000 (0.062–16.189)
CT 1 (0.9) 1 (0.9)    
rs28364998
Alleles
C 221 (98.7) 218 (97.3)   0.5034a 2.028 (0.501–8.210)
T 3 (1.3) 6 (2.7)    
Genotypes
CC 109 (97.3) 106 (94.6)   0.4988a 2.057 (0.501–8.436)
CT 3 (2.7) 6 (5.4)    
rs6275
Alleles
C 100 (44.6) 97 (43.3) 0.082 0.775 1.056 (0.727–1.533)
T 124 (55.4) 127 (56.7)    
Genotypes
CC 19 (17.0) 17 (15.2) 0.135 0.716  
CT 62 (55.4) 63 (56.2)   0.893  
TT 31 (27.7) 32 (28.6)   0.882  
rs6277
Alleles
C 216 (96.4) 196 (87.5) 12.082 0.001 3.857 (1.717–8.663)
T 8 (3.6) 28 (12.5)    
Genotypes
CC 104 (92.9) 87 (77.7)   0.0019a  
CT 8 (7.1) 22 (19.6)    
TT 0 (0.0) 3 (2.7)    
  1. Statistically significant difference, P<0.05; statistically nonsignificant, P>0.05.
  2. aFisher's Exact Test.