
A study of patients with advanced cancer found an increase in broad-spectrum antibiotic use in the last 3 months of life, South Korean researchers reported yesterday in JAMA Network Open.
For the nationwide cohort study, researchers used data from the South Korean National Health Insurance database to examine broad-spectrum antibiotic use among patients with advanced cancer who died from July 2002 through December 2021, calculating the proportion of patients who received antibiotics and the amount used. While patients with advanced cancer frequently receive antibiotics because of a heightened risk of bacterial infections, there's concern that excessive antibiotic use may compromise the quality of end-of-life care and promote the emergence of multidrug-resistant organisms.
The end-of-life trajectory was divided into five intervals: T1 (6 months to 3 months before death), T2 (3 months to 1 month before death), T3 (1 month to 2 weeks before death), T4 (2 weeks to 1 week before death), and T5 (final week before death).
Window for targeted stewardship interventions
Among the 515,366 decedents (mean age, 68.7 years; 64.7% male) included in the study, 288,151 (55.9%) received broad-spectrum antibiotics during the last 6 months of life. The proportion of patients receiving broad-spectrum antibiotics peaked during T2, with 144,920 (28.1%) patients receiving at least 1 dose, and declined to 68, 564 (13.3%) during T5. In contrast, total consumption peaked during T3, reaching 190.0 days of therapy per 1,000 patient-days. The patterns were consistent across antibiotic classes and cancer types.
During the last week of life, patients with leukemia had the highest exposure to broad-spectrum antibiotics compared with those with lung cancer (the reference group), both for prescription proportions (crude odds ratio, 1.50; 95% confidence interval [CI], 1.43 to 1.58) and total consumption (adjusted relative risk, 1.21; 95% CI, 1.19 to 1.23).
The study authors say the findings suggest that 3 months to 2 weeks before death could be a window for targeted stewardship interventions in advanced cancer patients.
"Our study may offer important insights for stewardship efforts targeting patients with advanced cancer in the end-of-life phase, suggesting a potential turning point when more deliberate prescribing decisions could be considered," they wrote.