title: Association of sleep and co-occurring psychological conditions at 1 year after traumatic brain injury.
abstract: OBJECTIVE
  To compare individuals' sleep 1 year after traumatic brain injury (TBI) with that of a healthy comparison group, and examine the relationship between sleep, co-occurring conditions, and functional status in those with TBI.
  
  
  METHODS
  Longitudinal assessment of a prospectively studied sample of individuals with moderate to severe TBI. Assessment of sleep occurred at 1 year after TBI.
  
  
  METHODS
  Inpatient acute rehabilitation for TBI and community follow-up at 1 year postinjury.
  
  
  METHODS
  Individuals with TBI (N=174) were recruited from consecutive admissions to an inpatient rehabilitation unit and enrolled into the TBI Model Systems study. Participant mean age was 38, and mean Glasgow Coma Scale score on admission was 9.3. Seventy-eight percent of the sample were men.
  
  
  METHODS
  None.
  
  
  METHODS
  Sleep was assessed with the Pittsburgh Sleep Quality Index (PSQI). Depression, anxiety, and pain were measured with the Patient Health Questionnaire-9, the Generalized Anxiety Disorder-7 Scale, and an analog pain rating scale, respectively.
  
  
  RESULTS
  Participants with TBI reported significantly greater sleep difficulties than the healthy comparison group. Forty-four percent of participants with TBI reported significant sleep problems (PSQI>5). Participants with 1 or more co-occurring conditions (depression, pain, or anxiety) had significantly worse sleep than those without such a condition. The highest level of sleep problems was reported by participants with multiple co-occurring conditions. Sleep problems were also associated with poor functional status.
  
  
  CONCLUSIONS
  Sleep difficulties are a frequent problem at 1 year after TBI, and often co-occur with depression, anxiety, and pain. Assessment and treatment of sleep difficulties should be included in clinical practice. Future research on the potential causal relationship among co-occurring conditions may assist in additional intervention planning.
authors: Dept of Rehabilitation Medicine, Box 356490, University of Washington, Seattle, WA 98195, USA. fogelber@uw.edu
authors: Donald J
authors: DJ
authors: Fogelberg
authors: Jeanne M
authors: JM
authors: Hoffman
authors: Sureyya
authors: S
authors: Dikmen
authors: Nancy R
authors: NR
authors: Temkin
authors: Kathleen R
authors: KR
authors: Bell
mesh_terms: D000328:Adult; D000367:Age Factors; D001930:Brain Injuries / Q000453:epidemiology / Q000523:psychology / Q000534:rehabilitation*; D015897:Comorbidity; D005260:Female; D015600:Glasgow Coma Scale; D006801:Humans; D008297:Male; D001523:Mental Disorders / Q000453:epidemiology*; D008875:Middle Aged; D012047:Rehabilitation Centers / Q000706:statistics & numerical data*; D012737:Sex Factors; D012893:Sleep Wake Disorders / Q000453:epidemiology*; D012959:Socioeconomic Factors; D013997:Time Factors