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Cross Sectional Study Sample

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This is a cross-sectional study. The sample size was estimated using Epiinfo statistical software. The population of interest was estimated to be approximately 400 subjects with BMI > 30 Kg/m2 from a total population of approximately 1,000 receiving health care at Policlínica Bella Vista (PBV) in Mayaguez PR. Estimating a prevalence rate of 0.3 (30%) of Obstructive Sleep Apnea (OSA) in this population, the program yielded a sample size = 179 to estimate the prevalence with a 95% confidence level. at 180.
After approval by the IRB of the Ponce Health Sciences University, the study was conducted at the PBV. Inclusion criteria: subjects of any sex, at least 21 years old and with body mass index (BMI) of at least 30Kg/m2 who visit Policlínica Bella Vista during the study period (09/01/19 to 01/31/17). Exclusion criteria were subjects already diagnosed with OSA, or with overt symptoms of OSA or with upper respiratory infections to reduce the chance of contamination of the equipment and/or alteration of the test results. Participants were recruited according to availability, asked to complete the Stop Bang questionnaire and explained about the overnight use of a HSAT equipment (RESMED Apnea Link Air Home Sleep Test) and to return it the next day. The form of comorbidities was filled by the investigator. The results were scored and validated by the Clinical and …show more content…

Estimation of the prevalence of OSA in the study sample will be made, according to accepted cutoff values for the home sleep test. Results of the Stop Bang questionnaire will be compared with those of the home sleep study to determine its sensitivity and specificity at different cutoff values. A Receiver Operating Characteristic (ROC) curve will be generated to establish the usefulness of the Stop bang Questionnaire (depending on the area under the curve) and the best cutoff value to optimize the sensitivity and

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