# The Use of Nasal Dilator Strips as a Placebo for Trials Evaluating Continuous Positive Airway Pressure

 Title: The Use of Nasal Dilator Strips as a Placebo for Trials Evaluating Continuous Positive Airway Pressure Author: Amaro, Aline C.S.; Duarte, Felipe H.G.; Jallad, Raquel S.; Bronstein, Marcello D.; Lorenzi-Filho, Geraldo; Redline, Susan Note: Order does not necessarily reflect citation order of authors. Citation: Amaro, Aline C.S., Felipe H.G. Duarte, Raquel S. Jallad, Marcello D. Bronstein, Susan Redline, and Geraldo Lorenzi-Filho. 2012. The use of nasal dilator strips as a placebo for trials evaluating continuous positive airway pressure. Clinics 67(5): 469-474. Full Text & Related Files: 3351249.pdf (128.7Kb; PDF) Abstract: Objectives: The aim of the current study was to compare the objective and subjective effects of continuous positive airway pressure to the use of nasal dilator strips in patients with acromegaly and moderate to severe obstructive sleep apnea. Methods: We studied 12 patients with acromegaly and moderate to severe obstructive sleep apnea (male/females = 8/4, age = 52$$\pm$$8 ys, body mass index = 33.5$$\pm$$4.6 Kg/m$$^2$$, apnea–hypopnea index = 38$$\pm$$14 events/h) who had been included in a randomized, crossover study to receive three months of treatment with continuous positive airway pressure and nasal dilator strips. All patients were evaluated at study entry and at the end of each treatment by polysomnography, and Epworth Sleepiness Scale, Pittsburgh Sleep Quality Index and treatment satisfaction questionnaires. Results: The apnea–hypopnea index values decreased significantly with continuous positive airway pressure treatment but did not change with the use of nasal dilator strips. All of the subjective symptoms improved with both treatments, but these improvements were significantly greater with continuous positive airway pressure than with the nasal dilator strips. Conclusion: The use of nasal dilator strips had a much smaller effect on the severity of obstructive sleep apnea in patients with acromegaly and moderate to severe obstructive sleep apnea in comparison to the use of continuous positive airway pressure. Moreover, the improvement in several subjective parameters without any significant objective improvement in obstructive sleep apnea resulting from the use of nasal dilator strips is compatible with a placebo effect. Published Version: doi:10.6061/clinics/2012(05)11 Other Sources: http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3351249/pdf/ Terms of Use: This article is made available under the terms and conditions applicable to Other Posted Material, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#LAA Citable link to this page: http://nrs.harvard.edu/urn-3:HUL.InstRepos:10399869 Downloads of this work: