Fig. 4
MPIS distribution across the well-moderately differentiated and poorly undifferentiated LUAD patients. The distribution of MPIS is significantly different between the well-moderately differentiated and poorly-undifferentiated groups on the a discovery set (P < 0.0001), b external validation set V1 (P = 0.0314), and c external validation set V2 (P = 0.0104). The P-value is obtained using the independent samples t-test. G1/G2, well-moderately differentiated; G3/G4, poorly undifferentiated