Antimicrobial Use among Adult Inpatients in Northern Canada, 2019-2021
Abstract
Background: Antimicrobial use data from inpatients in northern Canada suitable to inform stewardship programs are limited.
Objective: As a special project of the Canadian Nosocomial Infection Surveillance Program, to describe antimicrobial use for inpatients in northern Canadian acute care hospitals.
Methods: Participating acute care hospitals serving adult or mixed adult and pediatric populations in northern Canada submitted annual data on the use of all systemic antimicrobials from 2019 to 2021. Patient-day denominators were also submitted. Northern Canada was defined as the territories and Statistics Canada's provincial north. Data were analyzed in terms of defined daily doses per 1000 patient days (DDD/1000pd), as per the Anatomical Therapeutic Chemical classification system. Antimicrobials were categorized using the World Health Organization's AWaRe (Access/ Watch/Reserve) classification system.
Results: Each year, 42-47 hospitals participated. More than 90% of participating hospitals were in Alberta or British Columbia. There was large variation in overall antimicrobial use between hospitals (e.g., interquartile range 429 to 779 DDD/1000pd in 2021). From 2019 to 2021, there was a 49% relative increase in antimicrobial use, from 401 to 596 DDD/1000pd (p = 0.11). Over the same period, the use of third- and first-generation cephalosporins increased by 80% and 64%, respectively; antimicrobials in the "Reserve" category increased from 0.4% to 2% of overall use.
Conclusions:…
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