title: Sleep variables in anorexia nervosa: evolution with weight restoration.
abstract: OBJECTIVE
  Studies on sleep patterns in anorexia nervosa (AN) have yielded inconsistent results. Therefore, we have studied the evolution of subjective and objective sleep characteristics in AN patients before and after weight restoration.
  
  
  METHODS
  Thirty-four severely underweight AN inpatients of the restrictive subtype had a polysomnographic sleep registration at the time of admission and after weight restoration. Subjective sleep quality was also measured with self-report instruments.
  
  
  RESULTS
  Objective sleep variables did not change with weight restoration, whereas subjective quality of sleep did improve. Percentage of underweight at admission and amount of slow wave sleep were predictors of the length of time required for weight restoration.
  
  
  CONCLUSIONS
  The finding that weight restoration does not affect polysomnographic sleep variables in AN patients seems to contradict previous studies.
authors.affiliation: Department of Behavior Therapy, University Centre St. Jozef, Kortenberg, Belgium. Guido.Pieters@med.kuleuven.ac.be
authors.forename: Guido
authors.initials: G
authors.lastname: Pieters
authors.forename: Paul
authors.initials: P
authors.lastname: Theys
authors.forename: Walter
authors.initials: W
authors.lastname: Vandereycken
authors.forename: Bart
authors.initials: B
authors.lastname: Leroy
authors.forename: Joseph
authors.initials: J
authors.lastname: Peuskens
mesh_terms: D000328:Adult; D000856:Anorexia Nervosa / Q000453:epidemiology*; D015992:Body Mass Index; D001835:Body Weight; D003710:Demography; D005260:Female; D006801:Humans; D012893:Sleep Wake Disorders / Q000453:epidemiology*; D015430:Weight Gain