Tracking Clinical Competency Growth: A Longitudinal Study of Medical Students in a Multidisciplinary Emergency Department Internship Program.

Background: Emergency department (ED) internships are essential for developing core clinical competencies in medical students. This study evaluates the weekly progression of key competencies during a structured three-week ED internship and examines the impact of extending the program from two to three weeks. Additionally, it considers how such training supports students' readiness for multidisciplinary, team-based healthcare environments. Methods: This retrospective longitudinal study analyzed a total of 2068 workplace-based assessment (WBA) forms collected from June 2018 to May 2020. Each WBA evaluated ten key clinical competencies: learning attitude, history taking, clinical judgment, medical knowledge, prescription, communication, patient education, literature appraisal, oral presentation, and documentation. A subgroup of 133 medical students who completed the full three-week internship with complete WBA records was included in the longitudinal analysis. Generalized Estimating Equations (GEE) modeling assessed performance trends and inter-cohort differences between 2018 and 2019. Results: Significant improvements were observed across all competencies, with the most notable gains in history taking, clinical judgment, communication, prescription, and documentation. Learning attitude scores increased from 4.46 (SD = 0.66) in Week 1 to 4.58 (SD = 0.58) in Week 3. Prescription and documentation improved from 3.85 and 4.17 to 4.06 and 4.32, respectively. GEE analysis confirmed significant performance gains by Week 3 (p = 0.0064). Students in 2019 outperformed those in 2018 (p = 0.0318), suggesting that curriculum refinements enhanced educational outcomes. Conclusion: A structured three-week ED internship significantly enhances medical students' clinical competencies, particularly in areas fundamental to multidisciplinary care such as communication, clinical judgment, and documentation. The extended duration promotes deeper clinical immersion and fosters skill reinforcement through real-time feedback and collaborative practice. These findings underscore the importance of sustained, structured clinical experiences in preparing students to function effectively within interdisciplinary healthcare teams. Further research should investigate optimal training durations and integrative teaching strategies to support competency-based, team-oriented medical education.