A validation of wrist actigraphy against polysomnography in patients with schizophrenia or bipolar disorder

Lone Baandrup,1,2 Poul Jørgen Jennum3 1Center for Neuropsychiatric Schizophrenia Research (CNSR), 2Center for Clinical Intervention and Neuropsychiatric Schizophrenia Research (CINS), Copenhagen University Hospital, Mental Health Center Glostrup, Mental Health Services – Capita...

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Autores principales:	Baandrup L, Jennum PJ
Formato:	article
Lenguaje:	EN
Publicado:	Dove Medical Press 2015
Materias:	Neurosciences. Biological psychiatry. Neuropsychiatry RC321-571 Neurology. Diseases of the nervous system RC346-429
Acceso en línea:	https://doaj.org/article/37c741b6e31f4cf1afa002e60e10dfa1
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spelling	oai:doaj.org-article:37c741b6e31f4cf1afa002e60e10dfa12021-12-02T07:54:16ZA validation of wrist actigraphy against polysomnography in patients with schizophrenia or bipolar disorder1178-2021https://doaj.org/article/37c741b6e31f4cf1afa002e60e10dfa12015-08-01T00:00:00Zhttp://www.dovepress.com/a-validation-of-wrist-actigraphy-against-polysomnography-in-patients-w-peer-reviewed-article-NDThttps://doaj.org/toc/1178-2021Lone Baandrup,1,2 Poul Jørgen Jennum3 1Center for Neuropsychiatric Schizophrenia Research (CNSR), 2Center for Clinical Intervention and Neuropsychiatric Schizophrenia Research (CINS), Copenhagen University Hospital, Mental Health Center Glostrup, Mental Health Services – Capital Region of Denmark, Glostrup, Denmark; 3Danish Center for Sleep Medicine, Department of Clinical Neurophysiology, Center for Healthy Ageing, Faculty of Health Sciences, University of Copenhagen, Rigshospitalet, Glostrup, Denmark Purpose: Sleep disturbances are frequent in patients with schizophrenia or bipolar disorder. Actigraphy has been established as a generally reliable method to examine these disturbances across varying time spans, but the validity against polysomnography (PSG) is not well investigated for this population. We validated wrist-worn actigraphy against PSG in a population of chronic, medicated patients with schizophrenia or bipolar disorder. Patients and methods: From a clinical trial, we derived data from 37 patients with schizophrenia and five patients with bipolar disorder who were examined with one-night PSG and concomitant actigraphy. The following sleep variables were compared between the two methods: total sleep time, sleep efficiency, sleep latency, number of awakenings, and time awake after sleep onset. The degree of consistency between the two methods was evaluated using the intraclass correlation coefficient and Bland–Altman plots. Subgroup analyses included splitting the analyses according to sex, diagnosis, and duration of wakefulness after sleep onset. PSG was considered the gold standard. Results: The intraclass correlation coefficient was high for total sleep time, moderate for the number of awakenings, and low or zero for the other examined sleep variables. These findings were reproduced in the subgroup analyses that compared men and women, as well as patients with bipolar versus schizophrenia spectrum disorders. When excluding patients with extensive periods of wakefulness after the initial sleep period (wake after sleep onset >100 minutes), the reliability of the actigraphy-derived sleep variables markedly improved. Conclusion: Actigraphy reliably measures the total sleep time in this specific patient population. For patients without extensive periods of wakefulness after sleep onset, actigraphy might provide a useful measure of sleep efficiency, sleep latency, and number of awakenings. Keywords: actigraphy, polysomnography, validation, schizophrenia, bipolar disorder Baandrup LJennum PJDove Medical PressarticleNeurosciences. Biological psychiatry. NeuropsychiatryRC321-571Neurology. Diseases of the nervous systemRC346-429ENNeuropsychiatric Disease and Treatment, Vol 2015, Iss default, Pp 2271-2277 (2015)
institution	DOAJ
collection	DOAJ
language	EN
topic	Neurosciences. Biological psychiatry. Neuropsychiatry RC321-571 Neurology. Diseases of the nervous system RC346-429
spellingShingle	Neurosciences. Biological psychiatry. Neuropsychiatry RC321-571 Neurology. Diseases of the nervous system RC346-429 Baandrup L Jennum PJ A validation of wrist actigraphy against polysomnography in patients with schizophrenia or bipolar disorder
description	Lone Baandrup,1,2 Poul Jørgen Jennum3 1Center for Neuropsychiatric Schizophrenia Research (CNSR), 2Center for Clinical Intervention and Neuropsychiatric Schizophrenia Research (CINS), Copenhagen University Hospital, Mental Health Center Glostrup, Mental Health Services – Capital Region of Denmark, Glostrup, Denmark; 3Danish Center for Sleep Medicine, Department of Clinical Neurophysiology, Center for Healthy Ageing, Faculty of Health Sciences, University of Copenhagen, Rigshospitalet, Glostrup, Denmark Purpose: Sleep disturbances are frequent in patients with schizophrenia or bipolar disorder. Actigraphy has been established as a generally reliable method to examine these disturbances across varying time spans, but the validity against polysomnography (PSG) is not well investigated for this population. We validated wrist-worn actigraphy against PSG in a population of chronic, medicated patients with schizophrenia or bipolar disorder. Patients and methods: From a clinical trial, we derived data from 37 patients with schizophrenia and five patients with bipolar disorder who were examined with one-night PSG and concomitant actigraphy. The following sleep variables were compared between the two methods: total sleep time, sleep efficiency, sleep latency, number of awakenings, and time awake after sleep onset. The degree of consistency between the two methods was evaluated using the intraclass correlation coefficient and Bland–Altman plots. Subgroup analyses included splitting the analyses according to sex, diagnosis, and duration of wakefulness after sleep onset. PSG was considered the gold standard. Results: The intraclass correlation coefficient was high for total sleep time, moderate for the number of awakenings, and low or zero for the other examined sleep variables. These findings were reproduced in the subgroup analyses that compared men and women, as well as patients with bipolar versus schizophrenia spectrum disorders. When excluding patients with extensive periods of wakefulness after the initial sleep period (wake after sleep onset >100 minutes), the reliability of the actigraphy-derived sleep variables markedly improved. Conclusion: Actigraphy reliably measures the total sleep time in this specific patient population. For patients without extensive periods of wakefulness after sleep onset, actigraphy might provide a useful measure of sleep efficiency, sleep latency, and number of awakenings. Keywords: actigraphy, polysomnography, validation, schizophrenia, bipolar disorder
format	article
author	Baandrup L Jennum PJ
author_facet	Baandrup L Jennum PJ
author_sort	Baandrup L
title	A validation of wrist actigraphy against polysomnography in patients with schizophrenia or bipolar disorder
title_short	A validation of wrist actigraphy against polysomnography in patients with schizophrenia or bipolar disorder
title_full	A validation of wrist actigraphy against polysomnography in patients with schizophrenia or bipolar disorder
title_fullStr	A validation of wrist actigraphy against polysomnography in patients with schizophrenia or bipolar disorder
title_full_unstemmed	A validation of wrist actigraphy against polysomnography in patients with schizophrenia or bipolar disorder
title_sort	validation of wrist actigraphy against polysomnography in patients with schizophrenia or bipolar disorder
publisher	Dove Medical Press
publishDate	2015
url	https://doaj.org/article/37c741b6e31f4cf1afa002e60e10dfa1
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A validation of wrist actigraphy against polysomnography in patients with schizophrenia or bipolar disorder

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