Oropharyngeal crowding closely relates to aggravation of obstructive sleep apnea

Background

Obesity is known to be an important risk factor for obstructive sleep apnea (OSA). However, OSA can also be seen in non-obese patients with a small maxilla and/or mandible, as well as in all obese patients with such features. Thus, we hypothesized that regional factors, oropharyngeal crowding associated with fat deposition, and maxillomandibular enclosure size closely related to the severity of OSA.

Methods

A total of 703 male Japanese subjects, who were classified into obese (body mass index [BMI] ≥ 30 kg/m2; n=158) and non-obese (BMI Results

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