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. 2021 Mar 22;11(3):227. doi: 10.3390/jpm11030227

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© 2021 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Classification and regression trees of the cohort with metabolic syndrome were elaborated through CRT method for WHO 4 and WHO 6 variables of severe pneumonia by COVID-19, namely: (4) oxygen by mask or nasal; (6) intubation with mechanical ventilation (MV), mask with reservoir. (A) Pie charts represent the proportion of patients with MS who met the WHO 4 (light grey) or not (dark grey) at each node of the tree. MS: metabolic syndrome. (B) Pie charts represent the proportion of patients who met the WHO 6. MS: metabolic syndrome; LDH: lactate dehydrogenase.