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Kaplan–Meier curves on the risk of progression to severe dementia, focusing only on the individual NPSs that had been identified to be significant in the current study. For AD, this is based on the presence of seven significant NPSs (namely, depression, anxiety, apathy, delusions, hallucinations, irritability and motor disturbance). For non-AD, this is based on the presence of two significant NPSs (namely, delusions and hallucinations).
