Application of Berlin questionnaire in obstructive sleep apnea syndrome through soft palate morphology types.

Background: Obstructive sleep apnea (OSA) is a sleep disorder characterized by intermittent complete and partial airway collapse, resulting in frequent episodes of apnea and hypopnea. The Berlin questionnaire (BQ) is a simple, inexpensive instrument used to screen for OSA, which is about risk factors for sleep apnea, namely, snoring behavior, daytime sleepiness or fatigue, and the presence of obesity or hypertension. This 10-question test has since then become well known for its accuracy in predicting the presence of sleep apnea in patients.