Fig. 4

Construction of prognostic model for LC. A Forrest plot of univariate Cox regression analysis showing 8 genes identified as prognostic factors for LC. HR is short for Hazard ratio and 95%CI is 95% confidence interval. B The graph of the LASSO Cox regression analysis to determine the tuning parameter lambda. The horizontal axis is the log(lambda) and the vertical axis is partial likelihood Deviance the lowest value of which is the best Lambda. C Risk Score map. The vertical dotted line is the median of Risk Score. The red dots represent high-risk patients and the blue dots represent low-risk patients. D Risk Score map in GEO dataset. The vertical dotted line is the median of Risk Score. The red dots represent high-risk patients and the blue dots represent low-risk patients. E Kaplan–Meier survival curve in TCGA dataset. The horizontal and vertical axes are time and survival probability. Different colors represent different groups. p value is determined by the log-rank test. F Kaplan–Meier survival curve in GEO dataset. The horizontal and vertical axes are time and survival probability. Different colors represent different groups. p value is determined by the log-rank test