{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2025,10,17]],"date-time":"2025-10-17T13:38:58Z","timestamp":1760708338312,"version":"3.41.2"},"reference-count":30,"publisher":"Emerald","issue":"8","license":[{"start":{"date-parts":[[2011,10,4]],"date-time":"2011-10-04T00:00:00Z","timestamp":1317686400000},"content-version":"tdm","delay-in-days":0,"URL":"https:\/\/www.emerald.com\/insight\/site-policies"}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2011,10,4]]},"abstract":"<jats:sec><jats:title content-type=\"abstract-heading\">Purpose<\/jats:title><jats:p>This article seeks to explain how to monitor the chronic obstructive disease patient and control any complications so that timely treatment can be applied.<\/jats:p><\/jats:sec><jats:sec><jats:title content-type=\"abstract-heading\">Design\/methodology\/approach<\/jats:title><jats:p>Control charts and statistical process control (SPC) theory were used on chronic respiratory patient follow\u2010up and control. Controlling several variables simultaneously, using univariate charts, can be misleading, more so when there are correlated variables, so multivariate and univariate control charts were studied.<\/jats:p><\/jats:sec><jats:sec><jats:title content-type=\"abstract-heading\">Findings<\/jats:title><jats:p>One\u2010sided control charts are preferable when the aim is to detect changes in the mean solely in one direction. Thus, one\u2010sided, univariate and multivariate charts were built, which identified previously undetected out\u2010of\u2010control events.<\/jats:p><\/jats:sec><jats:sec><jats:title content-type=\"abstract-heading\">Research limitations\/implications<\/jats:title><jats:p>The study's main limitation is its retrospective nature. However, following\u2010up individual patients can highlight medical therapy effects.<\/jats:p><\/jats:sec><jats:sec><jats:title content-type=\"abstract-heading\">Practical implications<\/jats:title><jats:p>The article concludes that control charts, in particular one\u2010sided ones, are a valuable tool for monitoring chronic respiratory patients, thus contributing to medical decision making.<\/jats:p><\/jats:sec><jats:sec><jats:title content-type=\"abstract-heading\">Originality\/value<\/jats:title><jats:p>The article highlights control chart application to chronic respiratory patient follow\u2010up, permitting a global view of patient evolution over time.<\/jats:p><\/jats:sec>","DOI":"10.1108\/09526861111174198","type":"journal-article","created":{"date-parts":[[2011,10,15]],"date-time":"2011-10-15T07:06:11Z","timestamp":1318662371000},"page":"621-643","source":"Crossref","is-referenced-by-count":10,"title":["Chronic respiratory patient control by multivariate charts"],"prefix":"10.1108","volume":"24","author":[{"given":"Florbela","family":"Correia","sequence":"first","affiliation":[]},{"given":"Rui","family":"N\u00eaveda","sequence":"additional","affiliation":[]},{"given":"Pedro","family":"Oliveira","sequence":"additional","affiliation":[]}],"member":"140","reference":[{"key":"key2022020920171261800_b1","unstructured":"Alt, F.B. 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(2006), \u201cEvaluaci\u00f3n del uso de las cartas de control X, EWMA y CUSUM en un sistema de control de calidad para procesos no correlacionados\u201d, Ingenier\u00eda & Desarrolo, Vol. 20, pp. 35\u201044."},{"key":"key2022020920171261800_b8","unstructured":"Global Initiative for Chronic Obstructive Lung Disease (GOLD) (1998), available at: www.goldcopd.com\/."},{"key":"key2022020920171261800_b9","doi-asserted-by":"crossref","unstructured":"Hawkins, D.M. (1991), \u201cMultivariate quality control based on regression\u2010adjusted variables\u201d, Technometrics, Vol. 33, pp. 61\u201075.","DOI":"10.1080\/00401706.1991.10484770"},{"key":"key2022020920171261800_b10","doi-asserted-by":"crossref","unstructured":"Hayter, A.J. and Tsui, K. 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