title: Daily variations in objective nighttime sleep and subjective morning pain in older adults with insomnia: evidence of covariation over time.
abstract: OBJECTIVE
  To examine the relationship between objectively measured nocturnal sleep and subjective report of morning pain in older adults with insomnia; to examine not only the difference between persons in the association between sleep and pain (mean level over 14 days), but also the within-person, day-to-day association.
  
  
  METHODS
  Cross-sectional.
  
  
  METHODS
  North-central Florida.
  
  
  METHODS
  Fifty community-dwelling older adults (mean age+/-standard deviation 69.1+/-7.0, range 60-90) with insomnia.
  
  
  METHODS
  Daily home-based assessment using nightly actigraphic measurement of sleep and daily self-report of pain over 14 consecutive days.
  
  
  RESULTS
  Between persons, average sleep over 14 days was not associated with average levels of rated pain, but after a night in which an older adult with insomnia experienced above-average total sleep time he or she subsequently reported below-average pain ratings. The model explained approximately 24% of the within-person and 8% of the between-person variance in pain ratings.
  
  
  CONCLUSIONS
  Sleep and pain show day-to-day associations (i.e., covary over time) in older adults with insomnia. Such associations may suggest that common physiological systems underlie the experience of insomnia and pain. Future research should examine the crossover effects of sleep treatment on pain and of pain treatment on sleep.
authors.affiliation: Department of Clinical and Health Psychology, University of Florida, Gainesville, Florida 32610, USA.
authors.forename: Joseph M
authors.initials: JM
authors.lastname: Dzierzewski
authors.forename: Jacob M
authors.initials: JM
authors.lastname: Williams
authors.forename: Daniela
authors.initials: D
authors.lastname: Roditi
authors.forename: Michael
authors.initials: M
authors.lastname: Marsiske
authors.forename: Karin
authors.initials: K
authors.lastname: McCoy
authors.forename: Joseph
authors.initials: J
authors.lastname: McNamara
authors.forename: Natalie
authors.initials: N
authors.lastname: Dautovich
authors.forename: Michael E
authors.initials: ME
authors.lastname: Robinson
authors.forename: Christina S
authors.initials: CS
authors.lastname: McCrae
mesh_terms: D000368:Aged; D000369:Aged, 80 and over; D003430:Cross-Sectional Studies; D005260:Female; D006801:Humans; D007206:Individuality; D008297:Male; D008875:Middle Aged; D010146:Pain / Q000150:complications / Q000503:physiopathology*; D012890:Sleep / Q000502:physiology*; D007319:Sleep Initiation and Maintenance Disorders / Q000150:complications / Q000503:physiopathology*
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