{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,7,16]],"date-time":"2026-07-16T12:31:46Z","timestamp":1784205106115,"version":"3.55.0"},"reference-count":0,"publisher":"IOS Press","isbn-type":[{"value":"9781643686080","type":"electronic"}],"license":[{"start":{"date-parts":[[2025,8,7]],"date-time":"2025-08-07T00:00:00Z","timestamp":1754524800000},"content-version":"unspecified","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by-nc\/4.0\/"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2025,8,7]]},"abstract":"<jats:p>Accurate sleep stage classification is essential for diagnosing sleep disorders and assessing sleep quality. While polysomnography (PSG) remains the gold standard, photoplethysmography (PPG) is a more practical alternative due to its affordability and widespread use in wearable devices. However, state-of-the-art sleep staging methods often require prolonged continuous signal acquisition, which is impractical for wearable devices due to high energy consumption. Shorter signal acquisitions are more energy-efficient but typically compromise accuracy. This study proposes an adapted sleep staging model based on top-performing state-of-the-art methods, optimized for use with shorter PPG segment sizes. We concatenate 30-second PPG segments over 15-minute intervals to incorporate extended contextual information, balancing feasibility and accuracy. Our approach achieved an accuracy of 0.75, a Cohen\u2019s Kappa of 0.60, and F1-Weighted score of 0.74. The proposed strategy consistently outperformed methods using short PPG segment sizes. These findings highlight the potential of context-aware approaches to improve sleep staging accuracy in energy-constrained wearable applications.<\/jats:p>","DOI":"10.3233\/shti250897","type":"book-chapter","created":{"date-parts":[[2025,8,7]],"date-time":"2025-08-07T11:34:27Z","timestamp":1754566467000},"source":"Crossref","is-referenced-by-count":3,"title":["Enhancing Photoplethysmography-Based Sleep Staging Models Through Temporal Context Optimization"],"prefix":"10.3233","author":[{"ORCID":"https:\/\/orcid.org\/0000-0002-7582-0092","authenticated-orcid":false,"given":"Joseph A.P.","family":"Quino","sequence":"first","affiliation":[{"name":"Heart Institute, University of Sao Paulo (INCOR), Sao Paulo, SP, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Diego A.C.","family":"Cardenas","sequence":"additional","affiliation":[{"name":"Heart Institute, University of Sao Paulo (INCOR), Sao Paulo, SP, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Marcelo A.F.","family":"Toledo","sequence":"additional","affiliation":[{"name":"Heart Institute, University of Sao Paulo (INCOR), Sao Paulo, SP, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Felipe M.","family":"Dias","sequence":"additional","affiliation":[{"name":"Heart Institute, University of Sao Paulo (INCOR), Sao Paulo, SP, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Estela","family":"Ribeiro","sequence":"additional","affiliation":[{"name":"Heart Institute, University of Sao Paulo (INCOR), Sao Paulo, SP, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Jose E.","family":"Krieger","sequence":"additional","affiliation":[{"name":"Heart Institute, University of Sao Paulo (INCOR), Sao Paulo, SP, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Marco A.","family":"Gutierrez","sequence":"additional","affiliation":[{"name":"Heart Institute, University of Sao Paulo (INCOR), Sao Paulo, SP, Brazil"}],"role":[{"vocabulary":"crossref","role":"author"}]}],"member":"7437","container-title":["Studies in Health Technology and Informatics","MEDINFO 2025 \u2014 Healthcare Smart \u00d7 Medicine Deep"],"original-title":[],"link":[{"URL":"https:\/\/ebooks.iospress.nl\/pdf\/doi\/10.3233\/SHTI250897","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,8,7]],"date-time":"2025-08-07T11:34:27Z","timestamp":1754566467000},"score":1,"resource":{"primary":{"URL":"https:\/\/ebooks.iospress.nl\/doi\/10.3233\/SHTI250897"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2025,8,7]]},"ISBN":["9781643686080"],"references-count":0,"URL":"https:\/\/doi.org\/10.3233\/shti250897","relation":{},"ISSN":["0926-9630","1879-8365"],"issn-type":[{"value":"0926-9630","type":"print"},{"value":"1879-8365","type":"electronic"}],"subject":[],"published":{"date-parts":[[2025,8,7]]}}}