Correlation between adult trauma center status and radiology resident performance on trauma cases in the WIDI SIM exam

Purpose: To assess whether adult trauma center status influences radiology resident performance on trauma cases in the Emergent/Critical Care Imaging SIMulation (WIDI SIM) exam.

Materials and methods: This retrospective study analyzed 29,290 WIDI SIM exam scores from 110 adult trauma cases across 55 radiology residency programs. Residents were categorized by training level-R1 (n = 17,801), R2 (n = 9,136), R3 (n = 1,826), R4 (n = 527)-and by their program's adult trauma center designation: Level 1 (n = 20,121), Level 2 (n = 1,870), Level 3 (n = 1,029), Level 4 (n = 487), and no trauma designation (n = 5,834). A Generalized Linear Mixed Model with a negative binomial distribution was used to evaluate the effect of trauma center status on resident performance, adjusting for resident level, imaging modality, and case specialty.

Results: After adjusting for confounding variables, there was no statistically significant difference in resident scores based on adult trauma center status (p > 0.05 for all trauma levels compared to no trauma designation). Resident level significantly influenced performance, with higher-level residents scoring better than R1 residents (p < 0.001 for R2-R4). Imaging modality and case specialty also significantly affected scores. Residents performed better on MR, US, and XR modalities compared to CT (p ≤ 0.002), and scored lower on chest, cardiovascular, musculoskeletal, and neuro cases compared to abdominopelvic cases (p < 0.001).

Conclusion: Adult trauma center status did not significantly impact radiology resident performance on trauma cases in the WIDI SIM exam. Resident training level, imaging modality, and case specialty were significant factors influencing performance. These findings suggest that resident education and exposure to diverse imaging modalities and specialties are more critical determinants of diagnostic accuracy than the trauma center designation of their training program.