A study today by Canadian researchers suggests an antibiotic audit and feedback (A&F) program for primary care physicians is associated with “substantial” economic and clinical value.
For the study, a team led by researchers with the Ottawa Hospital Research Institute and Public Health Ontario analyzed data from a previously conducted randomized clinical trial involving nearly 5,000 primary care physicians in Ontario. That trial, whose results were published in 2024, found that the physicians who received a mailed letter comparing their antibiotic prescribing rate to that of their peers had a 5% lower antibiotic prescribing rate in patients aged 65 and older compared with physicians who didn’t receive the letter. The aim of the current study was to determine the return-on-investment (ROI) from the program.
Linking data from the trial with health care use and cost data from the Institute for Clinical and Evaluative Services in Toronto, the researchers developed a decision model to calculate monetary costs and benefits of the intervention. The benefits were quantified as the monetary value of avoiding antibiotics and antibiotic-associated adverse events, such as diarrhea, versus the costs of potential harms from undertreatment.
“While evidence on the effectiveness of audit and feedback interventions is growing, policymakers and stewardship teams require accumulating economic evidence to support sustained investment and broader implementation of these A&F programs,” the study authors wrote in JAMA Network Open.
Economic and patient safety benefits
The cost to run the program was $5.50 ($ 4.01 USD) per physician and generated $43.03 ($31.34) in savings per physician from reduced antibiotic use and reduced health care use for adverse events, resulting in an ROI of $8.82 ($6.42) for every dollar invested. In a scenario in which all 40,000 primary care physicians in Canada were enrolled in the program, the researchers estimated an ROI of $16.82 ($12.25).
The authors say the findings highlight “both the economic and patient safety benefits of the A&F program.”
“These findings support the integration of antibiotic A&F interventions into routine primary care as a scalable strategy to advance antimicrobial stewardship, improve prescribing practices, and enhance the sustainability of health care delivery,” they concluded.