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Hospitalization Type and Subsequent Severe Sepsis.

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Hospitalization disrupts the gut microbiome, increasing severe sepsis risk. This risk escalates with hospitalization type, from general stays to Clostridium difficile infection (CDI), highlighting a dose-response relationship.

Keywords:
dysbiosishumansmicrobiotapatient readmissionself-controlled case series

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Area of Science:

  • Microbiome research
  • Infectious disease epidemiology
  • Healthcare-associated infections

Background:

  • Hospitalization commonly causes microbiome disruption (dysbiosis).
  • Antimicrobial use exacerbates dysbiosis during hospital stays.

Purpose of the Study:

  • To investigate the association between hospitalization-induced dysbiosis and severe sepsis risk post-discharge.
  • To determine if different types of hospitalizations correlate with varying severe sepsis risks.

Main Methods:

  • Analysis of U.S. Health and Retirement Study participants with linked Medicare claims (1998-2010).
  • Comparison of severe sepsis risk within 90 days following non-infection-related hospitalization, infection-related hospitalization, and Clostridium difficile infection (CDI) hospitalization.
  • Utilized longitudinal and self-controlled case series study designs.

Main Results:

  • Severe sepsis risk increased with hospitalization severity: 4.1% after non-infection-related, 7.1% after infection-related, and 10.7% after CDI hospitalizations.
  • The incidence rate ratio (IRR) for severe sepsis was 3.3-fold higher post-hospitalization compared to other periods.
  • IRR was 30% higher after infection-related vs. non-infection-related hospitalizations, and 70% higher after CDI vs. infection-related hospitalizations.

Conclusions:

  • A significant dose-response relationship exists between dysbiosis-inducing events and subsequent severe sepsis hospitalization.
  • This relationship was specific to sepsis diagnoses and not observed for other rehospitalizations.