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. 2023 Sep 18;13:86. doi: 10.1186/s13613-023-01185-y

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© The Author(s) 2023

Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article's Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article's Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/.

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Fig. 2 — Unadjusted (UnA) and adjusted study of clinical outcomes. Standard logistic regression (LR), least absolute shrinkage and selection operator (LASSO) logistic regression and logistic regression after propensity-score matching (PSM) were used to assess clinical outcomes in EXT group with CTRL group as reference, presented as odds ratio with their respective 95% confidence intervals. VAP, ventilator-associated pneumonia. Corresponding P-values are given on the right