 Researchers developed the nomogram which evaluate the risk of recurrence after surgical resection, and found that the stage 1 NSCLC patients with more than 104 point of nomogram showed similar recurrence rate to the recurrence rate of stage 2 NSCLC patients. Thus those stage 1 NSCLC patients at high recurrence rate are considered to show positive effect of adjuvant chemotherapy and perform the study to prove this hypothesis. 