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Background: This study developed a new self-report assessment for Korean elderly driver based on the Rasch model by collecting extant assessment items. Methods: For development, extant approved assessment items were collected, and 44 essential items were selected by the opinions of 33 elderly and driving experts. Using these items, data on a total of 339 elderly drivers were collected, and a Rasch analysis was performed to exclude nonconforming subjects and items, select an optimal scale, and verify reliability and validity. Results: As a result of Rasch analysis, 31 subjects were found to be nonconforming. Based on the data of 308 subjects, 6 items were found to be nonconforming, and a total of 38 items were selected. These items and elderly drivers were arranged in order of difficulty and ability based on the logit values of 2.43 to 1.84. Subject ability was arranged in order from logit values of -2.44 to 2.44, from which a subject ability conversion equation was completed. The 3-point optimal scale and subareas of “On-road, Coping, and Health” were established. Conclusions: Through this study, a new self-report assessment for elderly drivers in South Korea was developed; it was named the SAFE-DR (Self-Assessment Forecasting Elder’s Driving Risk). 1

Development of a new self-report assessment for senior drivers in Korea