{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,2,14]],"date-time":"2026-02-14T00:18:22Z","timestamp":1771028302391,"version":"3.50.1"},"reference-count":56,"publisher":"MDPI AG","issue":"6","license":[{"start":{"date-parts":[[2017,6,17]],"date-time":"2017-06-17T00:00:00Z","timestamp":1497657600000},"content-version":"vor","delay-in-days":0,"URL":"https:\/\/creativecommons.org\/licenses\/by\/4.0\/"}],"funder":[{"DOI":"10.13039\/501100007509","name":"Sociedad Espa\u00f1ola de Neumolog\u00eda y Cirug\u00eda Tor\u00e1cica","doi-asserted-by":"publisher","award":["153\/2015"],"award-info":[{"award-number":["153\/2015"]}],"id":[{"id":"10.13039\/501100007509","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Ministerio de Econom\u00eda y Competitividad and the European Regional Development Fund","award":["RTC-2015-3446-1"],"award-info":[{"award-number":["RTC-2015-3446-1"]}]},{"name":"Ministerio de Econom\u00eda y Competitividad and the European Regional Development Fund","award":["TEC2014-53196-R"],"award-info":[{"award-number":["TEC2014-53196-R"]}]},{"name":"Consejer\u00eda de Educaci\u00f3n de la Junta de Castilla y Le\u00f3n and FEDER","award":["VA037U16"],"award-info":[{"award-number":["VA037U16"]}]},{"DOI":"10.13039\/100000002","name":"NIH","doi-asserted-by":"publisher","award":["1R01HL130984-01"],"award-info":[{"award-number":["1R01HL130984-01"]}],"id":[{"id":"10.13039\/100000002","id-type":"DOI","asserted-by":"publisher"}]},{"DOI":"10.13039\/501100003329","name":"Ministerio de Econom\u00eda y Competitividad","doi-asserted-by":"publisher","award":["IJCI-2014-22664"],"award-info":[{"award-number":["IJCI-2014-22664"]}],"id":[{"id":"10.13039\/501100003329","id-type":"DOI","asserted-by":"publisher"}]},{"name":"Ministerio de Econom\u00eda y Competitividad and University of Valladolid","award":["Promoci\u00f3n de Empleo Joven e Implantaci\u00f3n de la Garant\u00eda Juvenil en I+D+i"],"award-info":[{"award-number":["Promoci\u00f3n de Empleo Joven e Implantaci\u00f3n de la Garant\u00eda Juvenil en I+D+i"]}]},{"DOI":"10.13039\/501100000780","name":"European Commission","doi-asserted-by":"publisher","award":["POCTEP 0378_AD_EEGWA_2_P"],"award-info":[{"award-number":["POCTEP 0378_AD_EEGWA_2_P"]}],"id":[{"id":"10.13039\/501100000780","id-type":"DOI","asserted-by":"publisher"}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Entropy"],"abstract":"<jats:p>Untreated paediatric obstructive sleep apnoea syndrome (OSAS) can severely affect the development and quality of life of children. In-hospital polysomnography (PSG) is the gold standard for a definitive diagnosis though it is relatively unavailable and particularly intrusive. Nocturnal portable oximetry has emerged as a reliable technique for OSAS screening. Nevertheless, additional evidences are demanded. Our study is aimed at assessing the usefulness of multiscale entropy (MSE) to characterise oximetric recordings. We hypothesise that MSE could provide relevant information of blood oxygen saturation (SpO2) dynamics in the detection of childhood OSAS. In order to achieve this goal, a dataset composed of unattended SpO2 recordings from 50 children showing clinical suspicion of OSAS was analysed. SpO2 was parameterised by means of MSE and conventional oximetric indices. An optimum feature subset composed of five MSE-derived features and four conventional clinical indices were obtained using automated bidirectional stepwise feature selection. Logistic regression (LR) was used for classification. Our optimum LR model reached 83.5% accuracy (84.5% sensitivity and 83.0% specificity). Our results suggest that MSE provides relevant information from oximetry that is complementary to conventional approaches. Therefore, MSE may be useful to improve the diagnostic ability of unattended oximetry as a simplified screening test for childhood OSAS.<\/jats:p>","DOI":"10.3390\/e19060284","type":"journal-article","created":{"date-parts":[[2017,6,19]],"date-time":"2017-06-19T10:29:26Z","timestamp":1497868166000},"page":"284","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":28,"title":["Multiscale Entropy Analysis of Unattended Oximetric Recordings to Assist in the Screening of Paediatric Sleep Apnoea at Home"],"prefix":"10.3390","volume":"19","author":[{"given":"Andrea","family":"Crespo","sequence":"first","affiliation":[{"name":"Sleep-Ventilation Unit, Pneumology Service, R\u00edo Hortega University Hospital, c\/Dulzaina 2, Valladolid 47012, Spain"},{"name":"Biomedical Engineering Group, University of Valladolid, Paseo de Bel\u00e9n 15, Valladolid 47011, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Daniel","family":"\u00c1lvarez","sequence":"additional","affiliation":[{"name":"Sleep-Ventilation Unit, Pneumology Service, R\u00edo Hortega University Hospital, c\/Dulzaina 2, Valladolid 47012, Spain"},{"name":"Biomedical Engineering Group, University of Valladolid, Paseo de Bel\u00e9n 15, Valladolid 47011, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1237-3424","authenticated-orcid":false,"given":"Gonzalo C.","family":"Guti\u00e9rrez-Tobal","sequence":"additional","affiliation":[{"name":"Biomedical Engineering Group, University of Valladolid, Paseo de Bel\u00e9n 15, Valladolid 47011, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Fernando","family":"Vaquerizo-Villar","sequence":"additional","affiliation":[{"name":"Biomedical Engineering Group, University of Valladolid, Paseo de Bel\u00e9n 15, Valladolid 47011, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-5648-206X","authenticated-orcid":false,"given":"Ver\u00f3nica","family":"Barroso-Garc\u00eda","sequence":"additional","affiliation":[{"name":"Biomedical Engineering Group, University of Valladolid, Paseo de Bel\u00e9n 15, Valladolid 47011, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Mar\u00eda L.","family":"Alonso-\u00c1lvarez","sequence":"additional","affiliation":[{"name":"Unidad Multidisciplinar de Sue\u00f1o, CIBER Respiratorio, Hospital Universitario de Burgos, Burgos 09006, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Joaqu\u00edn","family":"Ter\u00e1n-Santos","sequence":"additional","affiliation":[{"name":"Unidad Multidisciplinar de Sue\u00f1o, CIBER Respiratorio, Hospital Universitario de Burgos, Burgos 09006, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0001-9915-2570","authenticated-orcid":false,"given":"Roberto","family":"Hornero","sequence":"additional","affiliation":[{"name":"Biomedical Engineering Group, University of Valladolid, Paseo de Bel\u00e9n 15, Valladolid 47011, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-4554-2167","authenticated-orcid":false,"given":"F\u00e9lix del","family":"Campo","sequence":"additional","affiliation":[{"name":"Sleep-Ventilation Unit, Pneumology Service, R\u00edo Hortega University Hospital, c\/Dulzaina 2, Valladolid 47012, Spain"},{"name":"Biomedical Engineering Group, University of Valladolid, Paseo de Bel\u00e9n 15, Valladolid 47011, Spain"}],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"1968","published-online":{"date-parts":[[2017,6,17]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","first-page":"365","DOI":"10.1016\/j.ijporl.2012.11.028","article-title":"Combination of symptoms and oxygen desaturation index in predicting childhood obstructive sleep apnea","volume":"77","author":"Chang","year":"2013","journal-title":"Int. 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