Multiplex PCR Pneumonia Panel in Critically Ill Patients Did Not Modify Mortality: A Cohort Study

Area of Science:

• Critical Care Medicine
• Infectious Diseases
• Clinical Microbiology

Background:

• Timely pathogen identification in critically ill patients can optimize antibiotic therapy and improve outcomes.
• Pneumonia is a common infection in intensive care unit (ICU) patients, necessitating effective diagnostic tools.

Purpose of the Study:

• To evaluate the impact of multiplex PCR pneumonia panels (PN-panels) on mortality and clinical outcomes in ICU patients with pneumonia.
• To assess the association between PN-panel use and length of hospital stay, ICU stay, and antibiotic duration.

Main Methods:

• A retrospective cohort study involving 304 adult pneumonia patients admitted to the ICU across four institutions.
• Inverse probability of treatment weighting was used to adjust for confounders when analyzing the association between PN-panel performance and outcomes.
• Key outcomes included 30-day mortality, hospital and ICU length of stay, and duration of antibiotic therapy.

Main Results:

• No significant association was found between PN-panel use and 30-day mortality (HR 1.14; 95% CI 0.76-1.70).
• Assessment by an infectious disease specialist was associated with significantly lower mortality (HR 0.29; 95% CI 0.19-0.45).
• The PN-panel did not demonstrate an association with changes in antibiotic duration or other clinical outcomes.

Conclusions:

• The utilization of multiplex PCR PN-panels in ICU pneumonia patients did not correlate with improved mortality or reduced hospital/ICU length of stay.
• Effective interpretation of PN-panel results requires integration with clinical data by an infectious disease team within an antimicrobial stewardship program.
• Clinical judgment and specialist infectious disease consultation appear more impactful on mortality than the PN-panel alone in this cohort.