224, AG, n = 59, and GG, n = 10 (2 samples could not be genotyped). In the experimental sample (n = 43), prospectively genotyped for the OPRM1 A118G SNP, genotypes were: AA, n = 23, AG, n = 18, and GG, n = 2. Comparisons were drawn between A-allele homozygotes (n = 23) and G-allele carries, combining AG and GG (n = 20).
