ERCC1 and gastric adenocarcinoma: For a prior probability of 0.01, assuming that the OR for specific genotype was 1.50 (risk) or 0.67 (protection), with statistical power of 0.361, the FPRP values were 0.007 for an association of the ERCC1 2–3 risk genotypes, with an increased risk of gastric adenocarcinoma in all individuals.