Fig. 4From: Prognostic value of eight immune gene signatures in pancreatic cancer patientsUnivariate Cox proportional hazard regression analysis (a) and multivariate Cox proportional hazard regression analysis (b) explored the correlation between risk score, age, sex, grade, T, N, M, smoking and OS. c The expression patterns of grouped samples were analyzed by PCA using all mRNAs. d The expression patterns of grouped samples were analyzed by PCA using Prognostic signatureBack to article page