Table I. Clinicopathological characteristics of patients.
CT: Computed tomography; GGN: ground-glass nodule; c-Stage: clinical stage; p-Stage: pathological stage; p-N: pathological-N; Ad: adenocarcinoma; Sq: squamous cell carcinoma; Pl: pleural invasion; Ly: lymphatic invasion; V: vascular invasion; CEA; carcinoembryonic antigen.