Please note:

• This screening questionnaire shall be used in combination with medical history taking and physical examination conducted by the neurologist specialized in sleep disorders in order to accurately diagnose obstructive sleep apnea.
• The screening questionnaire cannot be solely used to make a confirmatory diagnosis of obstructive sleep apnea. Polysomnography or sleep study remains a standard test used to diagnose and evaluate the severity of obstructive sleep apnea.
• This screening questionnaire does not include the assessment of craniofacial abnormalities which play an important role in developing obstructive sleep apnea. As craniofacial abnormalities have been frequently found in Asian populations, including Thais, therefore if people have answered less than 3 YES in this questionnaire, they might still be at risk of obstructive sleep apnea since craniofacial abnormalities are excluded from this screening tool.