IL6 and clostridium difficile infection: The most probable feature in the best-performing models for predicting recurrent CDI in a multivariable model was IL-6 (probability, 0.764), followed by PCR CT (0.711), EGF (0.192), IL-8 (0.111), eotaxin (0.066), IL-10 (0.058), hepatocyte growth factor (HGF) (0.056), and IL-4 (0.047).