title: Sleep duration and sleep disorder with red blood cell distribution width.
abstract: OBJECTIVE
  To examine the association of sleep duration and sleep disorder with red blood cell distribution width (RDW).
  
  
  METHODS
  Data from the 2005-2012 National Health and Nutrition Examination Survey were used, including 17,621 adults. A questionnaire was used to assess sleep duration and sleep disorder, with a blood sample used to assess RDW.
  
  
  RESULTS
  Compared to persons getting 7-8 hours/night of sleep, those getting 5, 9, and ≥ 10 hours/night respectively had a 23%, 29%, and 67% increased odds of having an elevated RDW (p < .05 for all odds ratios). Participants with a physician-diagnosed sleep disorder had a higher RDW (β = 0.08; p = .04).
  
  
  CONCLUSIONS
  Sleep duration and sleep disorder are associated with elevated RDW.
authors.affiliation: Department of Health, Exercise Science and Recreation Management, University of Mississippi, University, MS, USA. pdloprin@olemiss.edu.
authors.forename: Paul D
authors.initials: PD
authors.lastname: Loprinzi
mesh_terms: D004909:Erythrocyte Indices / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009749:Nutrition Surveys; D012890:Sleep / Q000502:physiology*; D012892:Sleep Deprivation / Q000097:blood / Q000503:physiopathology; D012893:Sleep Wake Disorders / Q000097:blood* / Q000503:physiopathology; D011795:Surveys and Questionnaires; D013997:Time Factors