Prospective validity evidence for the abbreviated emergency medicine Copenhagen Burnout Inventory.

Background: Prior research has provided retrospective validity evidence for an abbreviated Copenhagen Burnout Inventory (CBI) to measure burnout among emergency medicine (EM) residents. We sought to provide additional validity and reliability evidence for the two-factor, six-item abbreviated CBI.

Methods: This cross-sectional study used data from the abbreviated CBI that was administered following the 2022 American Board of Emergency Medicine In-training Examination. Confirmatory factor analysis (CFA) was performed and the prevalence of burnout among EM residents was determined.

Results: Of the 8918 eligible residents, 7465 (83.7%) completed the abbreviated CBI. CFA confirmed the previously developed model of two factors using six items answered with a 1- to 5-point Likert scale. The internal factor was derived from personal and work-related burnout and the external factor was related to caring for patients. The reliability was determined using Cronbach's alpha (0.87). The overall prevalence of burnout was 49.4%; the lowest prevalence was at the EM1 level (43.1%) and the highest was at the EM2 level (53.8%).

Conclusions: CFA of the abbreviated CBI demonstrated good reliability and model fit. The two-factor, six-item survey instrument identified an increase in the prevalence of burnout among EM residents that coincided with working in the COVID-19 environment. The abbreviated CBI has sufficient reliability and validity evidence to encourage its broader use.