Fig. 3
Kaplan-Meier survival analysis by grade, lymph node metastasis, and TNM stages status (n = 240). The y-axis represents the percentage of patient; the x-axis, their survival in months. a The green line represents patients with moderate grade of NSCLC with a trend of worse survival time than the blue line representing the well grade group (P < 0.001). Mean survival time was 44.1 months for the moderate grade of NSCLC group and 58.2 months for the well grade of NSCLC group. The brown line represents patients with poor grade of NSCLC with a trend of worse survival time than the blue line representing the well grade group (P = 0.027). b The green line represents patients with LNM of NSCLC with a trend of worse survival time than the blue line representing the no LNM group (P = 0.001). c The green line represents patients with stageII of NSCLC with a trend of worse survival time than the blue line representing the stageIgroup (P = 0.010). The brown line represents patients with stage III of NSCLC with a trend of worse survival time than the blue line representing the stage I group (P < 0.001). The brown line represents patients with stage III of NSCLC with a trend of worse survival time than the blue line representing the stage II group (P = 0.040)