Figure 4. Establishment and validation of the prognostic nomogram. (A, B) Univariate and multivariate Cox regression analysis of clinicopathologic variables and TMPRSS2 in lung cancer. (C) Nomogram for predicting the 1-, 3-, and 5-year OS of lung cancer patients. (D) Calibration curves of 1-, 3-, and 5-year OS of lung cancer patients.