Fig. 2.

The Spearman correlation coefficient network diagrams showed the relations between each pair of selected features in HR+/HER2− (a), HER2+ (c) and TNBC subtype (e). the Spearman correlation coefficient heat maps showed the relations between selected features and clinical characteristics in HR+/HER2− (b), HER2+ (d) and TNBC subtype (f). Each feature was independent predictor as there was no correlation coefficient >0.8 in each subtype. And all the imaging-derived features were independent from clinical characteristics as no correlation coefficient >0.8 was observed in each subtype.