“…CPRs include a combination of various demographic (age), clinical (ICU stay, hypotension, abdominal tenderness, ileus, delirium, immunosuppression, narcotic, proton pump inhibitor (PPI) or systemic antibiotic use, liver disease, diabetes, and malignancy) and laboratory variables (serum WBC, albumin, creatinine, blood urea nitrogen, and C-reactive protein concentration). Despite performing well in internal validation, most of the tested CPRs for poor outcomes of CDI had suboptimal discriminatory function with area under the receiver operating characteristics curve values between 0.63 and 0.74 (66,67). Noting such limitations with CPR, the simplest and most widely known prediction rule was introduced by the 2010 IDSA guidelines (68).…”