1. Assessing sleep-wake survival dynamics in relation to sleep quality in a placebo-controlled pharmacological intervention study with people with insomnia and healthy controls
- Author
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Tim R.M. Leufkens, Lieke W.A. Hermans, Marta Regis, Merel M. van Gilst, Annemiek Vermeeren, Sebastiaan Overeem, Pedro Fonseca, Section Psychopharmacology, RS: FPN NPPP II, Eindhoven MedTech Innovation Center, Signal Processing Systems, Biomedical Diagnostics Lab, Stochastic Operations Research, and EAISI Health
- Subjects
Male ,Sleep onset latency ,CONTINUITY ,INVENTORY ,Piperazines ,Sleep fragmentation ,0302 clinical medicine ,Sleep Initiation and Maintenance Disorders ,Insomnia ,EEG ,Original Investigation ,Weibull distribution ,Zopiclone ,Clinical Trials as Topic ,Cross-Over Studies ,INSTRUMENT ,Sleep state misperception ,Middle Aged ,Female ,FRAGMENTATION ,medicine.symptom ,medicine.drug ,Adult ,medicine.medical_specialty ,NREM ,Polysomnography ,Sleep, REM ,Placebo ,Non-rapid eye movement sleep ,PARAMETERS ,03 medical and health sciences ,Physical medicine and rehabilitation ,Double-Blind Method ,HYPNOTICS ,medicine ,Humans ,Aged ,Pharmacology ,Sleep quality ,business.industry ,Correction ,medicine.disease ,030228 respiratory system ,ONSET ,Sleep Deprivation ,Self Report ,business ,Azabicyclo Compounds ,030217 neurology & neurosurgery - Abstract
Rationale The mechanisms underlying impaired sleep quality in insomnia are not fully known, but an important role for sleep fragmentation has been proposed. Objectives The aim of this study is to explore potential mechanisms of sleep fragmentation influencing alterations of perceived sleep quality. Methods We analyzed polysomnography (PSG) recordings from a double-blind crossover study with zopiclone 7.5 mg and placebo, in elderly participants with insomnia complaints and age-matched healthy controls. We compared survival dynamics of sleep and wake across group and treatment. Subsequently, we used a previously proposed model to estimate the amount of sleep onset latency (SOL) misperception from PSG-defined sleep fragmentation. Self-reported and model-estimated amount of SOL misperception were compared across group and treatment, as well as model prediction errors. Results In the zopiclone night, the average segment length of NREM sleep was increased (group F = 1.16, p = 0.32; treatment F = 8.89, p< 0.01; group x treatment F = 0.44, p = 0.65), while the segment length of wake was decreased (group F = 1.48, p = 0.23; treatment F = 11.49, p< 0.01; group x treatment F = 0.36, p = 0.70). The self-reported and model-estimated amount of SOL misperception were lower during the zopiclone night (self-reported group F = 6.08, p< 0.01, treatment F = 10.8, p< 0.01, group x treatment F = 2.49, p = 0.09; model-estimated F = 1.70, p = 0.19, treatment F = 16.1, p< 0.001, group x treatment F = 0.60, p = 0.55). The prediction error was not altered (group F = 1.62, p = 0.20; treatment F = 0.20, p = 0.65; group x treatment F = 1.01, p = 0.37). Conclusions Impaired subjective sleep quality is associated with decreased NREM stability, together with increased stability of wake. Furthermore, we conclude that zopiclone-induced changes in SOL misperception can be largely attributed to predictable changes of sleep architecture.
- Published
- 2020