ACURÁCIA DO QUESTIONÁRIO DE BERLIN PARA IDENTIFICAR APNEIA OBSTRUTIVA DO SONO NA INSUFICIÊNCIA CARDÍACA CRÔNICA

ACCURACY OF THE BERLIN QUESTIONNAIRE TO IDENTIFY OBSTRUCTIVE SLEEP APNEA IN CHRONIC HEART FAILURE

Abstract

The objective of this study was to verify the accuracy of the Berlin Questionnaire (BQ) and the Epworth Sleepiness Scale (ESE) to identify obstructive sleep apnea (OSA) in individuals with Chronic Heart Failure (CHF). Nineteen individuals with CHF (57.2 ± 6.6 years old, 12 men) were submitted to portable polysomnography. The BQ was used to investigate the risk of OSA and the ESE was used to assess excessive daytime sleepiness. Thirteen patients were diagnosed with OSA (IAH≥15/hs) by portable polysomnography, but only three of them had excessive daytime sleepiness. Eleven patients were classified at high risk for OSA by the BQ. This questionnaire shows a sensitivity, specificity, positive and negative predictive values of 38.4%, 50%, 62.5 and 27.2%, respectively. ESE shows a sensitivity of 25%, a specificity of 100%, a positive predictive values of 100% and negative predictive values of 43.7%. The area under the ROC curve for QB was 0.44 and for ESE was 0.38. Both QB and ESE showed insufficient accuracy to identify OSA in individuals with CHF. In conclusion, BQ and ESE show insufficient accuracy to identify OSA in individuals with CHF. New questionnaires could be developed to screen OSA in patients with heart failure.