Table 4 Frequency of haplotypes of SLC6A3 and DRD2 gene polymorphisms in disfluent speech patients and controls

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

Haplotypes Patients (%) Controls (%) χ2 P OR (95% CI)
SLC6A3
 124C/1692C 220.00 (98.2) 217.00 (96.9) 0.000 1.000
 124C/1692T 3.00 (1.3) 6.00 (2.7)
 124T/1692C 1.00 (0.4) 1.00 (0.4)
DRD2
 939C/957C 92.01 (41.1) 80.03 (35.7) 1.354 0.245 1.254 (0.856–1.836)
 939C/957T 7.99 (3.6) 16.97 (7.6) 3.420 0.064 0.451 (0.191–1.069)
 939T/957C 123.99 (55.4) 115.97 (51.8) 0.577 0.447 1.155 (0.796–1.675)
 939T/957T 0.01 (0.0) 11.03 (4.9) 10.371 0.001 0.001 (0.000–0.010)
  1. Abbreviations: CI, confidence interval; OR, odds ratio.
  2. Statistically significant difference, P<0.05; statistically nonsignificant, P>0.05.