The devices record respiratory effort, pulse, oxygen saturation and nasal flow, and reports apneas, hypopneas, flow limitation, snoring, blood oxygen saturation and the probability of Cheyne-Stokes respiration (CSR) breathing patterns. More information on the proper use of the TRM can be found on the.Website:Description:ResMed ApneaLink hardware devices are sleep testing diagnostic products that offers patients the option of having a sleep test at home. General InformationTechnologies must be operated and maintained in accordance with Federal and Department security andprivacy policies and guidelines. Ethical approvalAll procedures performed in studies involving human participants were in accordance with the ethical standards of the institutional and/or national research committee and with the 1964 Helsinki declaration and its later amendments or comparable ethical standards. Conflict of interestAll authors certify that they have no affiliations with or involvement in any organization or entity with any financial interest (such as honoraria educational grants participation in speakers’ bureaus membership, employment, consultancies, stock ownership, or other equity interest and expert testimony or patent-licensing arrangements), or non-financial interest (such as personal or professional relationships, affiliations, knowledge, or beliefs) in the subject matter or materials discussed in this manuscript. The sponsor had no role in the design or conduct of this research. FundingThis study was supported by a grant of the Korean Health Technology R&D Project, Ministry of Health & Welfare, Republic of Korea (HC15C3415). Both sleep efficiency and the arousal index affect the results of ALP. ALP detects central sleep apnea to a certain degree.

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