Data collection
DISEASE, DISEASES, SECONDARY
Participants individually joined online from a remote location and remained connected with the faculty member while answering the questions. Microsoft Forms (Microsoft Corp., Redmond, DC, USA), a web service, was used to present the case questions. The URL of each case was presented, and participants accessed and answered the case questions using their own devices. Participants were asked to list the top three diseases in order of likelihood. We measured the time required to answer all case questions. One and 0 points were given for each correct and incorrect answer, respectively (maximum score: 20 points). When evaluating the differential diagnoses placed in the first three positions, 1 point was awarded for each correct answer among the three listed diseases. One teacher determined the correct answer. An answer was considered correct if a participant’s response was an exact match to the right name of the disease. Each group’s mean score was compared. As the primary outcome, we compared the mean score of the first position and that of the first three positions in the differentiation of diseases and the response time among the three medical student groups. As the secondary outcome, we evaluated the mean scores of the case questions regarding common diseases, emergent diseases, and difficulty levels by comparing the CDSS, Google, and residents’ groups in the same way.