title: Snoring analysis for the screening of Sleep Apnea Hypopnea Syndrome with a single-channel device developed using polysomnographic and snoring databases.
abstract: Several studies have shown differences in acoustic snoring characteristics between patients with Sleep Apnea-Hypopnea Syndrome (SAHS) and simple snorers. Usually a few manually isolated snores are analyzed, with an emphasis on postapneic snores in SAHS patients. Automatic analysis of snores can provide objective information over a longer period of sleep. Although some snore detection methods have recently been proposed, they have not yet been applied to full-night analysis devices for screening purposes. We used a new automatic snoring detection and analysis system to monitor snoring during full-night studies to assess whether the acoustic characteristics of snores differ in relation to the Apnea-Hypopnea Index (AHI) and to classify snoring subjects according to their AHI. A complete procedure for device development was designed, using databases with polysomnography (PSG) and snoring signals. This included annotation of many types of episodes by an expert physician: snores, inspiration and exhalation breath sounds, speech and noise artifacts, The AHI of each subject was estimated with classical PSG analysis, as a gold standard. The system was able to correctly classify 77% of subjects in 4 severity levels, based on snoring analysis and sound-based apnea detection. The sensitivity and specificity of the system, to identify healthy subjects from pathologic patients (mild to severe SAHS), were 83% and 100%, respectively. Besides, the Apnea Index (AI) obtained with the system correlated with the obtained by PSG or Respiratory Polygraphy (RP) (r=0.87, p<0.05).
authors.affiliation: Dept. ESAII, Universitat Politècnica de Catalunya, Institut de Bioenginyeria de Catalunya and CIBER de Bioengenieria, Biomateriales y Nanomedicina, Baldiri Reixac 4, Torre I, 9 floor, 08028 Barcelona, Spain.
authors.forename: Raimon
authors.initials: R
authors.lastname: Jané
authors.forename: José A
authors.initials: JA
authors.lastname: Fiz
authors.forename: Jordi
authors.initials: J
authors.lastname: Solà-Soler
authors.forename: Joana
authors.initials: J
authors.lastname: Mesquita
authors.forename: Josep
authors.initials: J
authors.lastname: Morera
mesh_terms: D016208:Databases, Factual; D006801:Humans; D017286:Polysomnography / Q000295:instrumentation* / Q000379:methods*; D020181:Sleep Apnea, Obstructive / Q000150:complications* / Q000175:diagnosis*; D012913:Snoring / Q000150:complications* / Q000175:diagnosis*