Supplementary Figure 3: QQ plots of observed versus expected P values for the Beijing study based on a logistic regression model adjusted for age, sex and three study-specific eigenvectors (first, fifth and seventh) to adjust for population stratification.

The red dots represent a plot using all SNPs, whereas the green dots represent a plot excluding SNPs (and SNPs within 500 kb of SNPs) previously reported to be associated with ESCC risk. The inflation factor lfor the plot using all SNPs was 1.00.