[Prognostic factors in patients with stage III and IV non-small cell lung cancer].

Objective: To investigate the prognostic factors in non-small cell lung cancer (NSCLC) at stage III and IV and establish a reliable model of clinical prognostic index.

Methods: Kaplan-Meier and Cox regression were used to analyze the relationship between the prognostic factors and survival time in 114 cases of NSCLC. The prognostic factors included clinical-pathological features and serum levels of cytokeratin fragment 19 (Cyfra21-1), CEA, neuron-specific enolase (NSE), CA125, interleukin-2 (IL-2) and soluble interleukin-2 receptors (sIL-2R).