Year: 2011
Type: article
Abstract: MSLT Stability in Insomnia-Roehrs et alniacs and controls with mean daily sleep latencies of 10.3 vs 8.6 min.15 What is evident in the studies above reporting significant MSLT differences between insomniacs and controls are the differences among the studies in the control sample MSLT mean sleep latencies, which range from 8.6 min to 12.3 min.All these studies used samples of convenience, recruiting their control samples through newspaper advertisements for normal sleepers.To better understand whether the MSLT is elevated in insomniacs it would be valuable to compare insomniacs to a population-based, representative sample of healthy non-insomniacs.The studies of MSLT in insomnia also differ in the definition of insomnia used.Some of the above cited studies defined insomnia based on a single complaint only, others used the standard clinical diagnostic criteria, and others included nocturnal polysomnographic (NPSG) entry criteria.How nocturnal sleep time relates to MSLT in insomnia is an important theoretical question.In studies of healthy normals, short MSLT mean daily sleep latencies are associated with diary-reported short total sleep times and high laboratory sleep efficiencies the night before the MSLT.16 These results suggest that the less the habitual nocturnal sleep, the greater the degree of daytime sleepiness.The question arises as to how sleep time in insomniacs relates to their MSLTs the following day.Finally, the studies of MSLT in insomnia report relatively large standard deviations.The wide variability among insomniacs may reflect high test-retest variability in a given individual's MSLT.No study has assessed the repeatability of MSLT results in insomniacs across time.Will an insomniac with an elevated MSLT show the same elevation across time?In this paper, we report MSLT results of a large sample of insomniacs participating in a chronic pharmacological treatment trial; compare these results to a representative population control sample; evaluate the relation of MSLT to NPSG sleep time; and importantly, assess the stability of the MSLT in insomnia.
Source: SLEEP
DOI: 10.5665/sleep.1426
Institutions: Henry Ford Health, Wayne State University, Henry Ford Hospital
Language: English
Topic: Sleep and related disorders
Subfield: Experimental and Cognitive Psychology
Field: Psychology
Domain: Social Sciences
Open Access status: bronze
Funder: National Institute on Drug Abuse
OpenAlex ID: W2063200548