Healthcare facility onset incidence rate of methicillin-resistant Staphylococcus aureus (MRSA) bloodstream infections (CMS)

Why is this measure important?

Methicillin-resistant Staphylococcus aureus (MRSA) is a type of bacteria that is resistant to many antibiotics. In a healthcare facility, MRSA can cause serious bloodstream infections.
MRSA can be spread by direct contact with infected cuts and sores and contaminated hands.
Hospital staff members can prevent most MRSA infections by following the infection control guidelines recommended by the Centers for Disease Control and Prevention (CDC). Hospitals following these safety guidelines will likely have low numbers in this measure.

What does this measure show?

Northwestern Memorial’s healthcare facility onset rates for MRSA bloodstream infections are based on results from lab tests taken on or after the fourth day of an inpatient hospital stay. The rate is shown using a Standardized Infection Ratio (SIR), which is used to determine if Northwestern Memorial’s rates of MRSA bloodstream infections are statistically different from the national average.
The MRSA infection score is shown as a Standardized Infection Ratio (SIR). This ratio is found by comparing the number of MRSA infections at Northwestern Memorial to a national benchmark. It only includes patients who had symptoms of MRSA infection and tested positive after they were in the hospital for four or more days. 
Northwestern Memorial’s performance in this measure is placed into one of three categories based on how it compares to the national benchmark.
These categories are:
·         Better than the benchmark
·         No different than the benchmark
·         Worse than the benchmark
Our most recent ratio for central line-associated bloodstream infections is considered to be No different than the benchmark” for this measure.
For this measure, a lower number is better.
Most Recent Available Data (Standardized Infection Ratio)
  2013 Q1
Northwestern Memorial 0.48
National Average 1
Source:Centers for Medicare and Medicaid Services,