title: Actigraphic monitoring during sleep of children with ADHD on methylphenidate and placebo.
abstract: OBJECTIVE
  Sleep disturbances appear as a comorbid condition in children with attention-deficit/hyperactivity disorder. The aim of this study was to investigate the relationship of activity levels during sleep and therapeutic response to methylphenidate (MPH).
  
  
  METHODS
  Nightly sleep actigraphic recordings during a double-blind, placebo-controlled, crossover clinical study (1-week of 0.5 mg/kg MPH; 1-week of placebo) were obtained on 44 children, 6 to 12 years old, diagnosed with attention-deficit/hyperactivity disorder (DSM-IV).
  
  
  RESULTS
  Significant (p <.005) differences between the conditions were found in several software-computed parameters: sleep onset latency (MPH, 39.3 minutes; placebo, 28.2 minutes), sleep efficiency (MPH, 78.0%; placebo, 80.4%), total sleep time (MPH, 7 hours; 57 minutes; placebo, 8 hours, 16 minutes). No significant differences on any of these measures were found among the 26 subjects who showed a moderate or large global improvement on MPH over placebo compared with 18 subjects who showed mild or no clinical improvement.
  
  
  CONCLUSIONS
  MPH, given twice daily, induces a slight but significant sleep disturbance. Motor activity levels during sleep did not differentiate children who responded to MPH from those who did not respond. This suggests that responders to MPH treatment do not experience greater sleep disturbances than nonresponders, at least at the dose studied.
authors.affiliation: Douglas Hospital Research Centre and the Department of Psychiatry, McGill University, Montreal, Canada.
authors.forename: George
authors.initials: G
authors.lastname: Schwartz
authors.forename: Leila Ben
authors.initials: LB
authors.lastname: Amor
authors.forename: Natalie
authors.initials: N
authors.lastname: Grizenko
authors.forename: Philippe
authors.initials: P
authors.lastname: Lageix
authors.forename: Chantal
authors.initials: C
authors.lastname: Baron
authors.forename: Diane B
authors.initials: DB
authors.lastname: Boivin
authors.forename: Ridha
authors.initials: R
authors.lastname: Joober
mesh_terms: D001289:Attention Deficit Disorder with Hyperactivity / Q000150:complications* / Q000188:drug therapy*; D000697:Central Nervous System Stimulants / Q000009:adverse effects* / Q000627:therapeutic use*; D002648:Child; D018592:Cross-Over Studies; D003625:Data Collection; D004311:Double-Blind Method; D005260:Female; D006801:Humans; D008297:Male; D008774:Methylphenidate / Q000009:adverse effects* / Q000627:therapeutic use*; D009068:Movement; D010919:Placebos; D012893:Sleep Wake Disorders / Q000139:chemically induced*
chemical_list: D000697:Central Nervous System Stimulants; D010919:Placebos; D008774:Methylphenidate