Number of concomitant medications in patients classified by
clinical factors
The number of concomitant medications was significantly higher in
patients with a higher CCI score (>=7 vs. <=6;P = 0.012), metastasis in multiple organs (>=2 vs. 0
or 1; P = 0.035), poorer PS (>=2 vs. 0 or 1;P =0.029), and a higher GRIm-Score (>=2 vs. 0 or 1;P = 0.016) (Figure 4A ). The cluster analysis dendrogram
revealed that compared to other factors, CCI scores have a relatively
close correlation with the number of concomitant medications(Figure 4B ).