Patient sex, histologic cell type, stage, and N2 disease, but not mediastinoscopy, had significant impacts on survival according to univariate analysis.

• 病人性别、组织细胞类型、发展阶段和N2期疾病，但是不包括纵隔镜检查，根据单变量分析发现对患者生存率有着重要的影响。