title: Concordance of Actigraphy With Polysomnography in Traumatic Brain Injury Neurorehabilitation Admissions.
abstract: OBJECTIVE
  To examine concordance of accelerometer-based actigraphy (ACG) with polysomnography (PSG) in the determination of sleep states in inpatients with traumatic brain injury (TBI), and examine the impact of injury severity and comorbid conditions (spasticity, apnea) on concordance.
  
  
  METHODS
  This was a convenience sample of 50 participants with primarily severe TBI.
  
  
  METHODS
  This was a retrospective chart review of concurrent administration of PSG with ACG in nonconsecutive rehabilitation admissions with TBI.
  
  
  METHODS
  Total sleep time and sleep efficiency were measured by PSG and ACG.
  
  
  RESULTS
  Moderate to strong correlations between ACG and PSG were observed for total sleep time (r = 0.78, P < .01) and sleep efficiency (r = 0.66, P < .01). PSG and ACG estimates of total sleep time (316 minutes vs 325 minutes, respectively) and sleep efficiency (78% vs 77%, respectively) were statistically indistinguishable.
  
  
  CONCLUSIONS
  Actigraphy is a valid proxy for monitoring of sleep in this population across injury severity and common comorbidity groups. However, further research with larger sample sizes to examine concordance in patients with TBI with disorder of consciousness and spasticity is recommended.
authors.affiliation: MHBS (Drs Kamper, Silva, and Nakase-Richardson), Medicine (Dr Schwartz), and Research (Dr Barnett), James A. Haley Veterans Hospital, Tampa, Florida; Department of Psychological and Social Foundations (Mr Garofano) and Department of Medicine (Drs Schwartz and Nakase-Richardson), University of South Florida, Tampa, Florida; Department of Psychiatry and Behavioral Sciences, Stanford Center for Sleep Sciences and Medicine, Stanford University, and Mental Illness, Research, Education, and Clinical Center, VA Palo Alto Health Care System, Palo Alto, California (Dr Zeitzer); Brain Rehabilitation Research Center, North Florida/South Georgia Veterans Health System, Gainesville, Florida (Dr Modarres); HSR&D Center of Innovation in Disability Rehabilitation and Research (Dr Nakase-Richardson), Tampa, Florida; Defense and Veterans Brain Injury Center, Silver Spring, Maryland (Drs Silva and Nakase-Richardson).
authors.forename: Joel E
authors.initials: JE
authors.lastname: Kamper
authors.forename: Jeffrey
authors.initials: J
authors.lastname: Garofano
authors.forename: Daniel J
authors.initials: DJ
authors.lastname: Schwartz
authors.forename: Marc A
authors.initials: MA
authors.lastname: Silva
authors.forename: Jamie
authors.initials: J
authors.lastname: Zeitzer
authors.forename: Mo
authors.initials: M
authors.lastname: Modarres
authors.forename: Scott D
authors.initials: SD
authors.lastname: Barnett
authors.forename: Risa
authors.initials: R
authors.lastname: Nakase-Richardson
mesh_terms: D056044:Actigraphy; D000293:Adolescent; D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D000070642:Brain Injuries, Traumatic / Q000150:complications* / Q000534:rehabilitation*; D005260:Female; D015600:Glasgow Coma Scale; D006760:Hospitalization; D006801:Humans; D008297:Male; D008875:Middle Aged; D000066530:Neurological Rehabilitation; D017286:Polysomnography; D012189:Retrospective Studies; D012893:Sleep Wake Disorders / Q000175:diagnosis* / Q000209:etiology*; D055815:Young Adult