Aged Equipment Design 5 Humans 5 Middle Aged 5 adult 5 aged 5 equipment design 5 human 5 middle aged 5 Adult 4 Female 4 Male 4 devices 4 female 4 male 4 controlled study 3 Article 2 outcome assessment 2 procedures 2 questionnaire 2 randomized controlled trial 2 Age Factors 1 Airway obstruction 1 Anchoring nail 1 Apnea 1 Apnea-hypopnea index 1 Bone Nails 1 Chronic obstructive pulmonary disease 1 Cross-Over Studies 1 Cross-Sectional Studies 1