Whether subjects with insomnia exhibit good sleep on some interval basis is unclear. Prior research suggests that patients with insomnia are highly variable with respect to night-to-night sleep continuity, that more than 40% of patients exhibit temporal patterning of good sleep, and that nearly 90% of patients exhibit better than average sleep following 1 to 3 nights of relatively poor sleep. The aim of the present study was to replicate and extend the above-noted findings utilizing: (i) a large sample studied over an extended time interval (ii) absolute standards for 'good' and 'poor' sleep; and (iii) a formal statistical methodology to assess temporal patterning and the association of time in bed with bout duration of poor or average sleep. Thirty-three subjects with insomnia and 33 good sleepers completed sleep diaries over the course of 110 days. It was found that subjects with insomnia (compared to good sleepers) had more poor nights (e.g. about 39 versus 7% of the assessed nights), a higher probability of a having a poor night on any given occasion (60% greater probability than good sleepers) and more consecutive nights of poor sleep between good sleep nights (median bout duration of approximately three versus one night). Lastly, it was found that (as would be predicted by both the Spielman model and the two-process model) time in bed moderated bout duration in the insomnia group. That is, longer times in bed were associated with longer bouts of poor sleep.
The incidence and temporal patterning of insomnia: a second study
Creators
Michael L. Perlis - University of Pennsylvania
Jarcy Zee - Biostat (United States)
Cindy Swinkels - Duke University
Jacqueline Kloss - Drexel University
Kevin Morgan - Supreme Council Of Health
Beverly David - University of Birmingham
Knashawn Morales - Biostat (United States)
Publication Details
Journal of sleep research, v 23(5), pp 499-507
Publisher
Wiley
Number of pages
9
Grant note
T32MH065218 / NATIONAL INSTITUTE OF MENTAL HEALTH; United States Department of Health & Human Services; National Institutes of Health (NIH) - USA; NIH National Institute of Mental Health (NIMH)
R01AT003332 / NATIONAL CENTER FOR COMPLEMENTARY &ALTERNATIVE MEDICINE; United States Department of Health & Human Services; National Institutes of Health (NIH) - USA; NIH National Center for Complementary & Alternative Medicine
Resource Type
Journal article
Language
English
Web of Science ID
WOS:000343012400003
Scopus ID
2-s2.0-84908885987
Other Identifier
991019353624704721
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