aDepartment of Medicine, Yong Loo Lin School of Medicine, National University of Singapore

bDepartment of Cardiology, National University Heart Centre Singapore, Singapore, Singapore

cBelun Technology Company Limited, Hong Kong, People's Republic of China

dDepartment of Respiratory Medicine, Alexandra Hospital, National University Health System, Singapore, Singapore

Correspondence to Professor Chi-Hang Lee, MBBS, MD, Department of Cardiology, National University Heart Centre Singapore, 1E Kent Ridge Road, NUHS Tower Block Level 9, Singapore 119228, Singapore. Tel: +65 67722493; fax: +65 68722998; e-mail: [email protected]

Abbreviations: AASM, American Academy of Sleep Medicine; AHI, apnea hypopnea index; EEG, electroencephalogram; EMG, electromyography; EOG, electrooculogram; ICC, intraclass correlation coefficients; ODI, oxygen desaturation index; OSA, obstructive sleep apnea; PSG, polysomnography; ROC, receiver operating characteristic; SpO2, oxygen saturation

Received 20 November, 2022

Revised 30 January, 2023

Accepted 19 February, 2023

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