BACKGROUND
Sepsis guidelines recommend daily review to de-escalate or stop antibiotics in appropriate patients. This randomized controlled trial evaluated an opt-out protocol to decrease unnecessary antibiotics in patients with suspected sepsis.
METHODS
We evaluated non-ICU adults on broad-spectrum antibiotics despite negative blood cultures at ten U.S. hospitals from September 2018 through May 2020. A 23-item safety check excluded patients with ongoing signs of systemic infection, concerning or inadequate microbiologic data, or high-risk conditions. Eligible patients were randomized to the opt-out protocol vs. usual care. The primary outcome was 30-day post-enrollment antibacterial days of therapy (DOT). Clinicians caring for intervention patients were contacted to encourage antibiotic discontinuation using opt-out language. If antibiotics were continued, clinicians discussed rationale for continuing antibiotics and de-escalation plans. To evaluate those with zero post-enrollment DOT, hurdle models provided two measures: 1) the odds ratio of antibiotic continuation and 2) ratio of mean DOT among those who continued antibiotics.
RESULTS
Among 9606 patients screened, 767 (8%) were enrolled. Intervention patients had 32% lower odds of antibiotic continuation (79% vs. 84%, OR 0.68, 95% confidence interval (CI) [0.47, 0.98]). DOT among those who continued antibiotics were similar (ratio of means 1.06, 95% CI [0.88-1.26]). Fewer intervention patients were exposed to extended-spectrum antibiotics (36% v. 44%. Common reasons for continuing antibiotics were treatment of localized infection (76%) and belief that stopping antibiotics was unsafe (31%). Thirty-day safety events were similar.
CONCLUSIONS
An antibiotic opt-out protocol targeting patients with suspected sepsis resulted in more antibiotic discontinuations, similar DOT when antibiotics were continued, and no evidence of harm.