title: Correlation between sleep disorder screening and executive dysfunction in children with attention deficit-hyperactivity disorder.
abstract: OBJECTIVE
  To compare frequency of sleep disorders (SD) and executive dysfunction (ED) in children with attention deficit-hyperactivity disorder (ADHD) and a control group.
  
  
  METHODS
  We studied 156 children with ADHD with a mean age of 8.5 years, and a control group with 111 children with a mean age of 8.3 years. We utilized the Pediatric Sleep Questionnaire (PSQ) to screen SD and the working memory measurement from the Wechsler intelligence scale for children (WISC-IV) to screen ED.
  
  
  RESULTS
  We did not observe an increased frequency of SD in children with ADHD compared with the controls. However, we did identify ED in children with ADHD; additionally a significant correlation was observed between the type of ADHD and SD and among ED, WISC-IV measurements, and type of SD in children with ADHD.
  
  
  CONCLUSIONS
  An increase of SD frequency in children with ADHD was not observed, but we did identify ED in children with ADHD. Additionally, a correlation among ADHD types, SD, ED, and WISC-IV measurements was observed in children with ADHD.
authors.affiliation: Laboratory of Cognitive Neurophysiology, National Institute of Rehabilitation, Mexico City, Mexico.
authors.forename: Elizabeth
authors.initials: E
authors.lastname: Zambrano-Sánchez
authors.affiliation: Department of Neurological Rehabilitation, National Institute of Rehabilitation, Mexico City, Mexico.
authors.forename: José A
authors.initials: JA
authors.lastname: Martínez-Cortés
authors.affiliation: Department of Psychological Integral Rehabilitation and Psychiatry, National Institute of Rehabilitation, Mexico City, Mexico.
authors.forename: Minerva
authors.initials: M
authors.lastname: Dehesa-Moreno
authors.affiliation: Department of Psychological Integral Rehabilitation and Psychiatry, National Institute of Rehabilitation, Mexico City, Mexico.
authors.forename: Yolanda
authors.initials: Y
authors.lastname: del Río-Carlos
authors.affiliation: Clinic of Sleep Disorders, School of Medicine, UNAM, Mexico City, Mexico.
authors.forename: Adrián
authors.initials: A
authors.lastname: Poblano
mesh_terms: D000704:Analysis of Variance; D001289:Attention Deficit Disorder with Hyperactivity / Q000503:physiopathology*; D016022:Case-Control Studies; D002648:Child; D056344:Executive Function / Q000502:physiology*; D005260:Female; D006801:Humans; D008297:Male; D008570:Memory, Short-Term; D009483:Neuropsychological Tests; D012016:Reference Values; D012893:Sleep Wake Disorders / Q000503:physiopathology*; D011795:Surveys and Questionnaires; D014888:Wechsler Scales