title: [Approximation of sleep duration and sleep efficiency using actography].
abstract: The actography is a cost-effective semiobjective method to measure sleep/wake-cycles. This is the reason why the actography should be used first. The actography is after the cost-intensive polysomnography the best method in diagnosis of sleep disorders and monitoring of sleep disorder therapy. Actography over several days allows a precise estimation of total sleep time and sleep efficiency and makes possible an analysis of sleep/wake in natural conditions. The estimation is better if the patient is in high wake body activity and the recording time is longer. The mean values of total sleep time and sleep efficiency from polysomnography and actography are congruent.
authors.affiliation: Psychiatrischen Universitätsklinik Freiburg, Universität Freiburg, Deutschland.
authors.forename: F
authors.initials: F
authors.lastname: Wallner
authors.forename: J
authors.initials: J
authors.lastname: Backhaus
authors.forename: F
authors.initials: F
authors.lastname: Hohagen
authors.forename: D
authors.initials: D
authors.lastname: Riemann
mesh_terms: D000328:Adult; D001143:Arousal / Q000502:physiology*; D002940:Circadian Rhythm / Q000502:physiology; D003362:Cost-Benefit Analysis; D006801:Humans; D008297:Male; D009043:Motor Activity / Q000502:physiology*; D017286:Polysomnography / Q000191:economics / Q000295:instrumentation*; D012016:Reference Values; D012894:Sleep Stages / Q000502:physiology*; D012893:Sleep Wake Disorders / Q000175:diagnosis / Q000503:physiopathology*