In order to clarify if the reduced NKD1 expression was associated with patients' prognoses, we employed the Cox's proportional hazard regression model, and the result showed that reduced expression of NKD1 protein was a hazard factor for the prognosis of patients with NSCLC (Hazard Ratio = 1.864, with 95% confidence interval = 1.143~2.975; P = 0.017, Table 3). Here, NKD1 is linked to non-small cell lung carcinoma.