{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,15]],"date-time":"2026-05-15T06:07:04Z","timestamp":1778825224516,"version":"3.51.4"},"reference-count":70,"publisher":"MDPI AG","issue":"11","license":[{"start":{"date-parts":[[2021,11,17]],"date-time":"2021-11-17T00:00:00Z","timestamp":1637107200000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"name":"German Federal Ministry for Economic Affairs and Energy","award":["ZF4825301AW9"],"award-info":[{"award-number":["ZF4825301AW9"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Life"],"abstract":"<jats:p>Introduction. Despite its high accuracy, polysomnography (PSG) has several drawbacks for diagnosing obstructive sleep apnea (OSA). Consequently, multiple portable monitors (PMs) have been proposed. Objective. This systematic review aims to investigate the current literature to analyze the sets of physiological parameters captured by a PM to select the minimum number of such physiological signals while maintaining accurate results in OSA detection. Methods. Inclusion and exclusion criteria for the selection of publications were established prior to the search. The evaluation of the publications was made based on one central question and several specific questions. Results. The abilities to detect hypopneas, sleep time, or awakenings were some of the features studied to investigate the full functionality of the PMs to select the most relevant set of physiological signals. Based on the physiological parameters collected (one to six), the PMs were classified into sets according to the level of evidence. The advantages and the disadvantages of each possible set of signals were explained by answering the research questions proposed in the methods. Conclusions. The minimum number of physiological signals detected by PMs for the detection of OSA depends mainly on the purpose and context of the sleep study. The set of three physiological signals showed the best results in the detection of OSA.<\/jats:p>","DOI":"10.3390\/life11111249","type":"journal-article","created":{"date-parts":[[2021,11,17]],"date-time":"2021-11-17T09:16:11Z","timestamp":1637140571000},"page":"1249","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":11,"title":["A Minimum Set of Physiological Parameters to Diagnose Obstructive Sleep Apnea Syndrome Using Non-Invasive Portable Monitors. A Systematic Review"],"prefix":"10.3390","volume":"11","author":[{"ORCID":"https:\/\/orcid.org\/0000-0003-0841-4382","authenticated-orcid":false,"given":"\u00c1ngel","family":"Serrano Alarc\u00f3n","sequence":"first","affiliation":[{"name":"School of Informatics, Reutlingen University, Alteburgstr. 150, 72762 Reutlingen, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0003-1965-9481","authenticated-orcid":false,"given":"Natividad","family":"Mart\u00ednez Madrid","sequence":"additional","affiliation":[{"name":"School of Informatics, Reutlingen University, Alteburgstr. 150, 72762 Reutlingen, Germany"},{"name":"Institute of Digital Medicine, I.M. Sechenov First Moscow State Medical University, 2-4 Bolshaya Pirogovskaya st., 119435 Moscow, Russian Federation"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-5192-2537","authenticated-orcid":false,"given":"Ralf","family":"Seepold","sequence":"additional","affiliation":[{"name":"Institute of Digital Medicine, I.M. Sechenov First Moscow State Medical University, 2-4 Bolshaya Pirogovskaya st., 119435 Moscow, Russian Federation"},{"name":"HTWG Konstanz, Department of Computer Science, Alfred-Wachtel-Str. 8, 78462 Konstanz, Germany"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2021,11,17]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"1387","DOI":"10.1378\/chest.14-0970","article-title":"International Classification of Sleep Disorders-Third Edition Highlights and Modifications","volume":"146","author":"Sateia","year":"2014","journal-title":"Chest"},{"key":"ref_2","doi-asserted-by":"crossref","first-page":"357","DOI":"10.1007\/s00431-019-03557-8","article-title":"Obstructive Sleep Apnea in Developmental Age. A Narrative Review","volume":"179","author":"Salvaggio","year":"2020","journal-title":"Eur. J. 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