Univariate analysis results for the combined genotypes of three SNPs within the SLC6A4 gene.

In the combined analysis, patients with at least one minor (variant) allele in any of the three SNPs in SLC6A4 were categorized together (+) and were compared with the patients who did not have the variant alleles at these polymorphic loci (−). OS: overall survival, DFS: disease-free survival, DSS: disease-specific survival.