Prevalence of positional sleep apnea in patients undergoing polysomnography.

  title={Prevalence of positional sleep apnea in patients undergoing polysomnography.},
  author={M Jeffery Mador and Thomas J. Kufel and Ulysses J. Magalang and Subhedhar Rajesh and Veena Watwe and Brydon J. B. Grant},
  volume={128 4},
STUDY OBJECTIVES The primary aim of this study was to determine the prevalence of positional obstructive sleep apnea using a functional definition. Positional sleep apnea was defined as a total apnea-hypopnea index (AHI) > or = 5 with a > 50% reduction in the AHI between the supine and nonsupine postures, and an AHI that normalizes (AHI < 5) in the nonsupine posture. A secondary aim was to determine if positional sleep apnea can be diagnosed accurately during a split-night study. DESIGN… 

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