This study aimed to prepare a draft of “dementia care rating” for the elderly with dementia whose whole lives must be carefully observed and to examine the rating’s reliability. As the first step, we conducted interview and field surveys of 79 nurses and 72 care workers to prepare a draft of dementia care rating. In these surveys, 3 areas, 27 items, and 135 questions in the International Classification of Functioning, Disability, and Health were investigated, and 81 questions were extracted. Since the results obtained from the nurses differed from those obtained from the care workers, a draft of the “dementia care raring: nurse edition (nurse edition)” and that of the “dementia care raring: care worker edition (care worker edition)” were prepared. As the second step, these drafts’ reliability was statistically verified by involving 85 nurses and 87 care workers. Cronbach’s α scores of all low-ranking items were 0.800 or higher, thereby projecting stable values. Therefore, internal consistency of the rating was evident. The questions in the nurse edition partially differed from those in the care worker edition; namely, the nurse edition was characteristically respecting a medical viewpoint and the care worker edition emphasized skills to support dementia patients’ daily lives.
