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Odds ratios (ORs) for recurrence of cancers. Shown are the ORs of recurrence associated with methylation of different tumor-related genes (TRGs) in (a) hypopharyngeal cancer; (b) laryngeal cancer; and (c) oral cancer. ORs were calculated based on the Cox proportional hazards model, adjusted for age (≥70 years vs. <70 years), sex, alcohol exposure, smoking status, and tumor stage (I and II vs. III and IV). CI: confidence interval. * p < 0.05.
