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Screening for subclinical sleep-disordered breathing.

S M Scharf1, E Garshick, R Brown

  • 1Pulmonary Division, Brockton/West Roxbury VA Medical Center, Massachusetts.

Sleep
|August 1, 1990
PubMed
Summary
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Self-administered questionnaires showed low accuracy in screening for sleep-disordered breathing (SDB). Short sleep studies offered moderate sensitivity for detecting SDB, but the apnea-hypopnea index (AHI) did not strongly predict nocturnal oxygen desaturation.

Area of Science:

  • Sleep Medicine
  • Cardiology
  • Respiratory Medicine

Background:

  • Sleep-disordered breathing (SDB) is prevalent in hypertensive individuals.
  • Screening tools for SDB are crucial for early detection and management.

Purpose of the Study:

  • To evaluate the efficacy of self-administered questionnaires and short sleep studies in screening for SDB among hypertensive men.
  • To assess the predictive value of symptom questionnaires and short polysomnography for SDB markers.

Main Methods:

  • 40 hypertensive men (36-66 years) unselected for symptoms underwent symptom questionnaires and overnight polysomnography.
  • Overnight polysomnography measured apnea-hypopnea index (AHI) and time with oxygen saturation <90% (T90).
  • Short 90-minute overnight studies and afternoon nap studies were analyzed for 10 subjects with AHI >= 10.

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Main Results:

  • 48% of participants had AHI >= 10, and 35% had T90 >= 10% by overnight polysomnography.
  • Symptom questionnaires showed low predictive value for AHI; only snoring and baseline Po2 predicted T90.
  • Short overnight studies had 100% specificity but 42% sensitivity for AHI >= 10; nap studies had 60% sensitivity.

Conclusions:

  • Self-administered questionnaires are unreliable for screening SDB in asymptomatic hypertensive men.
  • Short sleep studies demonstrate moderate sensitivity for detecting significant AHI.
  • AHI is not the primary factor influencing nocturnal desaturation in this cohort.