SnoringUvulaSleep Apnea SyndromesPalate, SoftHypopharynxNasal ObstructionOropharynxPolysomnographyVentilators, Negative-PressurePharynxSleep Apnea, ObstructiveSleep StagesSleepCephalometryAirway ResistanceGlottisAirway ObstructionMandibular AdvancementApneaTongueWakefulnessPulmonary VentilationInhalationNoseRespirationBody Mass IndexAnthropometryProspective StudiesAge FactorsQuestionnairesRisk Factors