title: Diastolic blood pressure is the first to rise in association with early subclinical obstructive sleep apnea: lessons from periodic examination screening.
abstract: BACKGROUND
  Obstructive sleep apnea syndrome (OSAS) is associated with long-term cardiovascular morbidity. Little is known about these relations at early stages. We conducted a case-control study in which we analyzed the clinical characteristics of young adults who underwent a periodic health examination and were screened for, and eventually found to experience, OSAS.
  
  
  METHODS
  We identified 121 subjects newly diagnosed in a sleep study as having OSAS, and 229 matched control subjects in which screening for OSAS was negative. All had a medical interview, physical examination, and routine laboratory tests.
  
  
  RESULTS
  Subjects who had OSAS had a higher, body mass index (3-kg/m(2) difference) and a higher diastolic blood pressure (4-mm Hg difference) value, without elevation in systolic blood pressure. There was no metabolic difference (lipids profile and fasting glucose levels) between groups.
  
  
  CONCLUSIONS
  Diastolic blood pressure is higher early in the course of OSAS. Long term follow-up may determine effects of prevention and early intervention in OSAS and associated hypertension.
authors.affiliation: Clinical Neurocardiology Section, National Institute of Neurological Disorders and Stroke, National Institutes of Health, Bethesda, Maryland 20892, USA. sharibiy@ninds.nih.gov
authors.forename: Yehonatan
authors.initials: Y
authors.lastname: Sharabi
authors.forename: Alon
authors.initials: A
authors.lastname: Scope
authors.forename: Natasha
authors.initials: N
authors.lastname: Chorney
authors.forename: Itamar
authors.initials: I
authors.lastname: Grotto
authors.forename: Yaron
authors.initials: Y
authors.lastname: Dagan
mesh_terms: D000328:Adult; D001794:Blood Pressure / Q000502:physiology*; D015992:Body Mass Index; D005260:Female; D006801:Humans; D006973:Hypertension / Q000175:diagnosis / Q000503:physiopathology* / Q000517:prevention & control; D008297:Male; D008403:Mass Screening; D020181:Sleep Apnea, Obstructive / Q000175:diagnosis* / Q000503:physiopathology* / Q000517:prevention & control