Table 1 Allele distribution of MAOA rs1137070 in heroin abusers and healthy controls.

From: MAOA rs1137070 and heroin addiction interactively alter gray matter volume of the salience network

  Group Allele* (Frequency) χ 2 p Odds ratio 95% confidence interval
T C
Male Heroin n = 725 407 (0.561) 318 (0.439) 5.88 0.015 1.264 1.046–1.529
Control n = 1113 688 (0.618) 425 (0.382)
Female Heroin n = 307 355 (0.578) 259 (0.422) 5.9 0.015 1.245 1.043–1.486
Control n = 1440 1816 (0.631) 1064 (0.369)
Total Heroin n = 1032 762 (0.569) 577 (0.431) 14.22 <0.001 1.274 1.122–1.443
Control n = 2553 2504 (0.627) 1489 (0.373)
  1. *Male allele = n, Female allele = 2n, Total allele = Male allele + Female allele.