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Table 1 Hospital-onset MRSA bloodstream infections – facility level and national (patient level) performance

From: The incidence of MRSA infections in the United States: is a more comprehensive tracking system needed?

Acquisition dates

Average facility SIR

Average national SIR

Number of facilities

1/1/2013 to 9/30/2013

0.95876

0.96766

1666

1/1/2013 to 12/31/2013

0.91540

0.94380

1889

7/1/2013 to 6/30/2014

0.91484

0.91766

1906

10/1/2013 to 9/30/2014

0.89426

0.90195

1904

1/1/2014 to 12/31/2014

0.89134

0.89422

1916

4/1/2014 to 3/31/2015

0.89717

0.90124

1911

7/1/2014 to 6/30/2015

0.92568

0.91835

1899

10/1/2014 to 9/30/2015

0.96378

0.94811

1825

1/1/2015 to 12/31/2015

0.98812

0.98740

1830

  1. Data for National Level Performance was derived from hospitals that also had a calculable SIR. NHSN data from https://data.medicare.gov/data/hospital-compare (SIR: Standardized Infection Ratio) (The Facility Level data standard deviation for acquisition dates 1/1/2014 to 12/31/2014 was 0.7730. The Facility Level data standard deviation for acquisition dates 1/1/2015 to 12/31/2015 was 0.8753. Unpaired t-test P < 0.0003)