2.4.1. Primary Outcome
DISEASE
The primary outcome was a significant difference in the correct answer rate for the differential diagnoses listed by the resident physician. A correct answer was defined as when any of the three differential diagnoses listed by the resident physician matched the disease played by the simulated patient. The correctness of the physicians’ differential diagnosis was judged by three collaborators—a physician, an orthopedist, and an ophthalmologist—all with more than 10 years of clinical experience. The collaborators judged whether the answers were correct and were blinded to the intervention state. If any of the collaborators’ judgments differed, the judgment was decided by majority decision. When controversial, the correctness of the answer was decided on in consultation with the corresponding author, who was blinded to the intervention state.