Centers for Disease Control and Prevention, National Healthcare Safety Network

Annual standardized infection ratio (SIR) of bloodstream infections (BSIs) among children and adults receiving maintenance hemodialysis at outpatient hemodialysis facilities. BSIs are defined as positive blood cultures for hemodialysis patients which are reported monthly by participating facilities. The SIR is reported for a yearly period (calendar year) and is calculated by dividing the number of observed BSIs by the number of predicted BSIs during the year.

Annual risk-adjusted standardized infection ratio (SIR) of catheter-associated urinary tract infections (CAUTI) among adults and children hospitalized as inpatients at acute care hospitals, oncology hospitals, long-term acute care hospitals, and acute care rehabilitation hospitals.   SIR is reported annually and is calculated by dividing the number of observed CAUTIs into the number of predicted CAUTIs. 

Annual risk-adjusted standardized infection ratio (SIR) of central line-associated bloodstream infections (CLABSI) among adults and children hospitalized as inpatients at acute care hospitals, critical access hospitals, oncology hospitals, and long-term acute care hospitals. SIR is reported annually and is calculated by dividing the number of observed CLABSIs by the number of predicted CLABSIs.