Fig. 2.

Correlation plots of log₂‐transformed DSP and standard IHC scores for four common markers: ER, Ki‐67, CD4, and CD8. Tumor compartment scores were compared with IHC scores for ER and Ki‐67 because these markers express predominantly in the tumor. Scores for both the tumor and stromal compartments were evaluated for CD4 and CD8. The Pearson correlation coefficient (R) and corresponding P‐value for testing the hypothesis that true correlation is 0 were used to assess the strength of the association between standard IHC and DSP scores.