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Standardized Infection Ratio for Surgical Site Infection after Colon Surgery: Discord in Models Measuring Healthcare Quality

  • Raymond Chinn (a1), Jason M. Lempp (a2), Susan S. Huang (a3), Rekha Murthy (a4), Francesca J. Torriani (a5), Jacqueline Daley (a1), Elaine Dekker (a6), Barbara Goss-Bottorff (a7), Wendy Kaler (a8), Karen Meyer (a9), Frank Myers (a5), Amy Nichols (a10), Kathleen Quan (a11) and David Birnbaum (a12)...


The government publishes 3 different public report surgical site infection (SSI) metrics, all called standardized infection ratios (SIRs), that impact perceived hospital quality. We conducted a non-random cross-sectional observational pilot study of 20 California hospitals that voluntarily submitted colon surgery and SSI data. Discordant SIR values, leading to contradictory conclusions, occurred in 35% of these hospitals.

Infect Control Hosp Epidemiol 2016;1–5


Corresponding author

Address correspondence to Raymond Chinn, MD, Sharp Metropolitan Medical Campus, 7901 Frost Street, San Diego, CA 92123 (


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Infection Control & Hospital Epidemiology
  • ISSN: 0899-823X
  • EISSN: 1559-6834
  • URL: /core/journals/infection-control-and-hospital-epidemiology
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Chinn supplementary material
Appendix A-B

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