Supplementary Figure 1 and Supplemetary Table 1

Supplementary Figure 1: Flow chart of data selection from the National Cancer Database starting with the original 39,182 patients with patients with cutaneous invasive malignancies. Supplementary Table 1: The association between treatment center volume (TCV) and overall survival. TCV was modeled as a continuous variable and an exploratory sensitivity analysis determined the lowest threshold TCV associated with an OS difference. The model was adjusted for patient, tumor-specific, management, and hospital-setting characteristics.补充图1：源自美国国家癌症数据库（National Cancer Database）的患者筛选流程图，以最初纳入的39182例皮肤侵袭性恶性肿瘤患者为起始。 补充表1：治疗中心诊疗量（Treatment Center Volume, TCV）与总生存期（overall survival, OS）的相关性。研究将TCV设为连续变量进行建模，并通过探索性敏感性分析确定了与总生存期差异相关的最低TCV阈值。该模型针对患者特征、肿瘤特异性特征、治疗管理情况及医院环境特征进行了校正。