Distribution of PPP2R1A gene promoter genotypes and their association with the risk of HCC.

aAll observed genotype frequencies among the control subjects were in agreement with Hardy-Weinberg equilibrium (p2+2pq+q2 = 1) (for −241 (−/G), χ2 = 0.335, P = 0.568 among the southern Chinese).bAdjusted in a logistic regression model that included age, sex and HBV status. OR, odds ratio; CI, confidence interval.cP values for the test of the multiplicative interaction between the PPP2R1A promoter −241 (−/G) variant and selected variables on cancer risk were calculated using unconditional logistic regression models.