Summary

Description

This table shows the Center for Disease Control and Prevention (CDC) National Healthcare Safety Network (NHSN) standardized infection ratios (SIR) of hospital onset (HO) methicillin-resistant Staphylococcus aureus bloodstream Infections (MRSA BSI) reported by California general acute care hospitals other than long-term and rehabilitation acute care hospitals. The HO MRSA BSI SIR, which adjusts for significant risk factors, is calculated by comparing the number of MRSA BSI that occurred (or were observed) in the hospital in 2013 to the number that would be predicted based on the national referent MRSA BSI rate data. MRSA BSI cases are classified as HO when the first positive blood test is obtained after the third day of hospitalization. Risk factors found to be significant in predicting HO MRSA BSI incidence include hospital bed size, affiliation with a medical school, and the community burden of MRSA BSI as observed in patients admitted to the hospital. Adjusting for these factors provides for a more accurate comparison of hospitals’ infections. For more precise comparisons, NHSN only calculates a SIR when at least one HO MRSA BSI is predicted, which is determined by patient volume and other factors predictive of acquiring MRSA BSI. However, we calculated the SIR for such hospitals with HO MRSA BSI predicted less than one if the number of HO MRSA BSI observed was greater than zero. For each hospital with a MRSA BSI SIR, we performed a statistical analysis to determine if the observed number of infections was significantly different than the predicted number. Based on our statistical analysis we labeled each hospital’s MRSA BSI SIR as: • No difference - no difference in number of observed and predicted infections, • Higher - high or more infections than predicted, or • Lower - low or fewer infections than predicted. To link the CDPH facility IDs with those from other Departments, like OSHPD, please reference the "Licensed Facility Cross-Walk" Open Data table at https://chhs.data.ca.gov/Facilities-and-Services/Licensed-Facility-Cross...