ALB and Abnormality of the urinary system: The univariate analysis results showed that prior hospital stay, ICU stay, operation history, urinary catheter insertion, mechanical ventilation, tracheostomy, central venous catheter insertion, bronchofiberscope use, gastric tube insertion, wound drainage tube use, urinary system disease, surgical trauma, cephalosporins exposure, carbapenem exposure, antifungal agents exposure, glycopeptides and oxazolidinones exposure, high white blood cell count, low hemoglobin, low blood albumin, and high blood glucose were all risk factors for CREC infection.