title: The 'Cognitions' index of the Parkinson's Disease Questionnaire-39 relates to sleep disturbance and hallucinations.
authors.affiliation: Parkinson's Disease Research Clinic, Brain and Mind Research Institute, University of Sydney, NSW, Australia.
authors.forename: Courtney C
authors.initials: CC
authors.lastname: Walton
authors.affiliation: Parkinson's Disease Research Clinic, Brain and Mind Research Institute, University of Sydney, NSW, Australia.
authors.forename: Jennifer Y Y
authors.initials: JY
authors.lastname: Szeto
authors.affiliation: Parkinson's Disease Research Clinic, Brain and Mind Research Institute, University of Sydney, NSW, Australia.
authors.forename: James M
authors.initials: JM
authors.lastname: Shine
authors.affiliation: Parkinson's Disease Research Clinic, Brain and Mind Research Institute, University of Sydney, NSW, Australia. Electronic address: simonl@med.usyd.edu.au.
authors.forename: Simon J G
authors.initials: SJ
authors.lastname: Lewis
mesh_terms: D001007:Anxiety / Q000503:physiopathology*; D003071:Cognition / Q000502:physiology*; D003863:Depression / Q000503:physiopathology*; D004644:Emotions / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D010300:Parkinson Disease / Q000503:physiopathology*
keywords: Cognition; Hallucinations; Parkinson's disease; Quality of life; Sleep