Liselotte Sonnesen

2. Materials and Methods 2.1. Subjects 2.1.1. OSA Patients The data on the OSA patient group was systematically selected as part of standard material from 111 patients at the Dental Sleep Clinic, Section of Orthodontics, Department of Odontology at the University of Copenhagen.

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1 Background Sleep-disordered breathing (SDB) includes different clinical entities such as primary snoring, upper airway resistance syndrome, obstructive hypoventilation and obstructive sleep apnoea syndrome [1]. Symptoms of SDB include impaired well-being, growth and general development [1], which is why early diagnosis and prevention of risk of SDB are important.