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Forest plots showing the multivariate Cox analysis of variables prognostic for local control, regional control, and distant control. The variables included age, sex, PS, T classification, N classification, bone invasion, tumor differentiation, margin status, number of PLN, and ECS. The data are shown with HR (95% CI). *P < 0.05, **P < 0.01, ***P < 0.005, **** P < 0.0001. ECS, extracapsular nodal spread; PLN, positive lymph nodes.
