In addition, after stratified by study design or genotyping methods, no significant association was observed for UCP2 -866G/A polymorphism in both PCC (REM OR = 1.05, 95% CI 0.98–1.12) and HCC (REM OR = 0.84, 95% CI 0.57–1.26), and the same in both PCR-RFLP and others (Table S1). This evidence concerns the gene UCP2 and hepatocellular carcinoma.