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Factor structure of the Japanese version of the Quality of Life in Alzheimer's Disease Scale (QOL‐AD)

The Quality of Life in Alzheimer's Disease Scale (QOL‐AD) developed by Logsdon et al. in1999 is believed to be useful for evaluating responses from both patients and their caregivers. We previously confirmed both the reliability and the validity of the Japanese version of the QOL‐AD. However, the factor structure of this scale should be confirmed because the QOL‐AD covers multiple facets of dementia patients’ lives. Thus, we performed a factor analysis of the Japanese QOL‐AD. Then, we examined the correlations between each of the identified QOL factor scores and the results of other scales.