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Related Experiment Videos

Facial axis angle as a risk factor for obstructive sleep apnea.

Yukiko Kubota1, Hideaki Nakayama, Toshinori Takada

  • 1Division of Respiratory Medicine, Niigata University Graduate School of Medical and Dental Sciences, Japan.

Internal Medicine (Tokyo, Japan)
|September 15, 2005
PubMed
Summary

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Obstructive sleep apnea (OSA) in Japanese men is linked to facial structure, not just obesity. A smaller sella to nasion to subspinale angle (SNA) and sella to nasion to supramentale angle (SNB) correlate with OSA severity in non-obese individuals.

Area of Science:

  • Sleep Medicine
  • Otolaryngology
  • Orthodontics

Background:

  • Obstructive sleep apnea (OSA) severity often correlates with obesity.
  • Japanese OSA patients tend to be less obese than Caucasian counterparts, suggesting different etiological factors.
  • Understanding specific risk factors in diverse populations is crucial for effective treatment.

Purpose of the Study:

  • To investigate bony craniofacial factors associated with OSA in Japanese men.
  • To identify skeletal differences contributing to OSA etiology in this population.
  • To explore the relationship between facial morphology and OSA severity.

Main Methods:

  • Retrospective review of clinical records for 206 Japanese men with snoring and daytime sleepiness.
  • Cephalometric analysis using Sella-Nasion references and the Ricketts method.

Related Experiment Videos

  • Statistical comparison of measurements, including the apnea hypopnea index (AHI).

    • Main Results:

    • Body mass index and facial axis angle were dominant determinants of AHI.
    • Non-obese severe OSA patients exhibited lower sella to nasion to subspinale (SNA) and sella to nasion to supramentale (SNB) angles compared to mild/moderate OSA patients.
    • A dolico facial pattern was identified as a potential risk factor.

    Conclusions:

    • Obesity and dolico facial patterns are potential risk factors for OSA in Japanese men.
    • Reduced SNA and SNB angles appear associated with OSA severity, particularly in non-obese individuals.
    • Craniofacial morphology plays a significant role in OSA development in the Japanese population.