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Forest map of univariate and multivariate Cox regression analyses assessing independent prognostic factors age, sex, tumor grade, tumor stage, T, N, and risk score in patients with laryngeal cancer. (a) Univariate Cox regression analyses; (b) multivariate Cox regression analyses. An HR value >1 (red) indicates high risk, and an HR value <1 (green) indicates low risk
HR, hazard ratio; 95% CI, 95% confidence interval.
