Prospective observational study assesses long-term dementia risk in Parkinson disease, suggesting historical 80% prevalence estimates may require significant revision.
It is widely cited that dementia occurs in up to 80% of patients with Parkinson disease (PD), but studies reporting such high rates were published over two decades ago, had relatively small samples, and had other limitations. We aimed to determine long-term dementia risk in PD using data from two large, ongoing, prospective, observational studies.
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Gallagher et al. (2024) studied this question.
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