Clinical predictors of effective continuous positive airway pressure in patients with obstructive sleep apnea/hypopnea syndrome

Chi Chih Lai, Michael Friedman, Hsin Ching Lin*, Pa Chun Wang, Michelle S. Hwang, Cheng Ming Hsu, Meng Chih Lin, Chien Hung Chin

*Corresponding author for this work

Research output: Contribution to journalJournal Article peer-review

19 Scopus citations


Objectives/Hypothesis To identify standard clinical parameters that may predict the optimal level of continuous positive airway pressure (CPAP) in adult patients with obstructive sleep apnea/hypopnea syndrome (OSAHS). Study Design This is a retrospective study in a tertiary academic medical center that included 129 adult patients (117 males and 12 females) with OSAHS confirmed by diagnostic polysomnography (PSG). Methods All OSAHS patients underwent successful full-night manual titration to determine the optimal CPAP pressure level for OSAHS treatment. The PSG parameters and completed physical examination, including body mass index, tonsil size grading, modified Mallampati grade (also known as updated Friedman's tongue position [uFTP]), uvular length, neck circumference, waist circumference, hip circumference, thyroid-mental distance, and hyoid-mental distance (HMD) were recorded. Results When the physical examination variables and OSAHS disease were correlated singly with the optimal CPAP pressure, we found that uFTP, HMD, and apnea/hypopnea index (AHI) were reliable predictors of CPAP pressures (P = .013, P = .002, and P <.001, respectively, by multiple regression). When all important factors were considered in a stepwise multiple linear regression analysis, a significant correlation with optimal CPAP pressure was formulated by factoring the uFTP, HMD, and AHI (optimal CPAP pressure = 1.01 uFTP + 0.74 HMD + 0.059 AHI - 1.603). Conclusions This study distinguished the correlation between uFTP, HMD, and AHI with the optimal CPAP pressure. The structure of the upper airway (especially tongue base obstruction) and disease severity may predict the effective level of CPAP pressure.

Original languageEnglish
Pages (from-to)1983-1987
Number of pages5
Issue number8
StatePublished - 01 08 2015

Bibliographical note

Publisher Copyright:
© 2015 The American Laryngological, Rhinological and Otological Society, Inc.


  • Snoring
  • continuous positive airway pressure
  • obstructive sleep apnea/hypopnea syndrome
  • sleep apnea


Dive into the research topics of 'Clinical predictors of effective continuous positive airway pressure in patients with obstructive sleep apnea/hypopnea syndrome'. Together they form a unique fingerprint.

Cite this