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The Parkinson's KinetiGraph (<jats:styled-content style=\"fixed-case\">PKG<\/jats:styled-content>) can be used as an objective measure of different motor states and periods of immobility may reflect episodes of sleep. Our aim was to evaluate whether <jats:styled-content style=\"fixed-case\">PKG<\/jats:styled-content> can be used as an objective marker of disturbed night\u2010time sleep in <jats:styled-content style=\"fixed-case\">PD<\/jats:styled-content>.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods<\/jats:title><jats:p>In this prospective comparative study, data from <jats:styled-content style=\"fixed-case\">PKG<\/jats:styled-content> recordings over six consecutive 24 h periods are compared with Hauser diaries and scales focusing on motor state, sleep and <jats:styled-content style=\"fixed-case\">HRQ<\/jats:styled-content>oL in <jats:styled-content style=\"fixed-case\">PD<\/jats:styled-content> patients. Thirty\u2010three \u2018non\u2010sleepy\u2019 <jats:styled-content style=\"fixed-case\">PD<\/jats:styled-content> patients (<jats:styled-content style=\"fixed-case\">PD<\/jats:styled-content>\u2010<jats:styled-content style=\"fixed-case\">NS<\/jats:styled-content>) were compared with 30 <jats:styled-content style=\"fixed-case\">PD<\/jats:styled-content> patients presenting with excessive daytime sleepiness (<jats:styled-content style=\"fixed-case\">PD<\/jats:styled-content>\u2010<jats:styled-content style=\"fixed-case\">EDS<\/jats:styled-content>). The groups were matched for age, gender and Hoehn and Yahr state.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p>In the <jats:styled-content style=\"fixed-case\">PD<\/jats:styled-content>\u2010<jats:styled-content style=\"fixed-case\">EDS<\/jats:styled-content> group subjective sleep reports correlated with the <jats:styled-content style=\"fixed-case\">PKG<\/jats:styled-content>'s parameters for quantity and quality night\u2010time sleep, but not in the <jats:styled-content style=\"fixed-case\">PD<\/jats:styled-content>\u2010<jats:styled-content style=\"fixed-case\">NS<\/jats:styled-content> group. There were no significant correlations of the night\u2010time sleep quantity parameters of the Hauser diary with subjective sleep perception, neither in the <jats:styled-content style=\"fixed-case\">PD<\/jats:styled-content>\u2010<jats:styled-content style=\"fixed-case\">EDS<\/jats:styled-content> nor in the <jats:styled-content style=\"fixed-case\">PD<\/jats:styled-content>\u2010<jats:styled-content style=\"fixed-case\">NS<\/jats:styled-content> group.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions<\/jats:title><jats:p>This first <jats:styled-content style=\"fixed-case\">PKG<\/jats:styled-content> based study of night\u2010time sleep in <jats:styled-content style=\"fixed-case\">PD<\/jats:styled-content> suggests that <jats:styled-content style=\"fixed-case\">PKG<\/jats:styled-content> could be used to provide an easy to use and rough evaluation of aspects of night\u2010time sleep and one that could flag patients where polysomnography may be required. In sleepy <jats:styled-content style=\"fixed-case\">PD<\/jats:styled-content> patients for instance, quantity and quality <jats:styled-content style=\"fixed-case\">PKG<\/jats:styled-content> parameters correlate with different aspects of sleep such as insomnia, parasomnia and restless legs syndrome.<\/jats:p><\/jats:sec>","DOI":"10.1111\/ene.13015","type":"journal-article","created":{"date-parts":[[2016,5,10]],"date-time":"2016-05-10T12:11:01Z","timestamp":1462882261000},"page":"1275-1288","update-policy":"https:\/\/doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":51,"title":["Night\u2010time sleep in Parkinson's disease \u2013 the potential use of Parkinson's KinetiGraph: a prospective comparative study"],"prefix":"10.1111","volume":"23","author":[{"given":"L.","family":"Klingelhoefer","sequence":"first","affiliation":[{"name":"Department of Neurology Technical University Dresden Dresden Germany"},{"name":"Biomedical Research Unit Department of Neurology National Parkinson Foundation International Centre of Excellence King's College Hospital and King's College London UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"A.","family":"Rizos","sequence":"additional","affiliation":[{"name":"Biomedical Research Unit Department of Neurology National Parkinson Foundation International Centre of Excellence King's College Hospital and King's College London UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"A.","family":"Sauerbier","sequence":"additional","affiliation":[{"name":"Biomedical Research Unit Department of Neurology National Parkinson Foundation International Centre of Excellence King's College Hospital and King's College London UK"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"S.","family":"McGregor","sequence":"additional","affiliation":[{"name":"Centre for Clinical Neurosciences and Neurological Research St Vincent's Hospital Melbourne Fitzroy Vic. 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