Reliability and Validity of the Functional Outcomes of Sleep Questionnaire - Spanish Short Version (FOSQ-10SV) in Peruvian Patients With Obstructive Sleep Apnea

The aim of this study was to verify the reliability and validity of the Spanish short version of the Functional Outcomes of Sleep Questionnaire (FOSQ-10SV) in Peruvian patients with obstructive sleep apnea (OSA). Participants underwent physical examinations, completed the FOSQ-10SV, and polysomnography tests were carried out. A total of 672 patients were analyzed, 75 females (11%), mean age 50.5 ± 13.8 years. A total of 563 patients (84%) had OSA. The mean FOSQ-10SV score was 15.96 ± 3.23. The FOSQ-10SV Cronbach alpha was 0.84 and two significant factors were extracted in the factor analysis-both factors explained a variance of 43% and 14%. A significant correlation was found between the FOSQ-10SV score and the apnea-hypopnea index. Patients with more severe disease have a lower FOSQ-10SV score ( = .003). Ninety-nine patients with OSA who started continuous positive airway pressure treatment were followed, and we observed an improvement in the FOSQ-10SV score from pretreatment to posttreatment ( < .001). The FOSQ-10SV has internal consistency, construct validity, and the sensitivity to change in Peruvian patients with OSA who undergo treatment.