Rocca and his team's results show that relatives of patients with Parkinson’s disease (PD) may have an increased risk of developing dementia or cognitive impairment. They conclude, “Cognitive impairment or dementia may share familial susceptibility factors with PD (genetic or nongenetic).”

The Rocca team’s article is entitled “Risk of Cognitive Impairment or Dementia in Relatives of Patients With Parkinson Disease.” The other collaborators are James H. Bower; J. Eric Ahlskog; Alexis Elbaz; Brandon R. Grossardt; Shannon K. McDonnell; Daniel J. Schaid; and Demetrius M. Maraganore.

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