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In Journal of clinical sleep medicine : JCSM : official publication of the American Academy of Sleep Medicine

STUDY OBJECTIVES : It is crucial for the surgical treatment of patients with obstructive sleep apnea-hypopnea syndrome (OSAHS) to accurately locate the obstructive sites in the upper airway. However, non-invasive methods for locating the obstructive sites have not been well explored. Snoring, as the cardinal symptom of OSAHS, should contain information reflecting the state of the upper airway. Through the classification of snores produced at four different locations, this study aimed to test the hypothesis that snores generated by various obstructive sites differ.

METHODS : We trained and tested our model on a public dataset that contained 219 participants. For each snore episode, an acoustic and a physiological feature were extracted and concatenated forming a 59-dimensional fusion feature. A principal component analysis (PCA) and a support machine vector (SVM) were used for dimensional reduction and snore classification. The performance of the proposed model was evaluated with several metrics: sensitivity, precision, specificity, area under the receiver operating characteristic curve (AUC), and F1 score.

RESULTS : The unweighted average values of sensitivity, precision, specificity, AUC, and F1 were 86.36%, 89.09%, 96.4%, 87.9% and 87.63%, respectively. The model achieved 98.04%, 80.56%, 72.73%, and 94.12% sensitivity for Types V, O, T, and E snores.

CONCLUSIONS : The characteristics of snores are related to the state of the upper airway. The machine-learning-based model can be used to locate the vibration sites in the upper airway.

Sun Jingpeng, Hu Xiyuan, Peng Silong, Peng Chung-Kang, Ma Yan


machine learning, multiscale entropy, obstructive sleep apnea hypopnea syndrome, snore classification