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What is nosocomial? Large variation in hospital choice of numerators and denominators affects rates of hospital-onset methicillin-resistant Staphylococcus aureus.

  • Author(s): Datta, Rupak
  • Kuo King, Melissa
  • Kim, Diane
  • Nguyen, Christopher
  • Elkins, Kristen
  • Gombosev, Adrijana
  • Avery, Taliser R
  • Meyers, Hildy
  • Cheung, Michele
  • Huang, Susan S
  • et al.

Published Web Location

https://doi.org/10.1086/668025Creative Commons 'BY' version 4.0 license
Abstract

We calculated hospital-onset methicillin-resistant Staphylococcus aureus (HO-MRSA) rates for Orange County, California, hospitals using survey and state data. Numerators were variably defined as HO-MRSA occurring more than 48 hours (37%), more than 2 days (30%), and more than 3 days (33%) postadmission. Survey-reported denominators differed from state-reported patient-days. Numerator and denominator choices substantially impacted HO-MRSA rates.

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