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. 2021 May 21;11:10727. doi: 10.1038/s41598-021-90246-y

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© The Author(s) 2021

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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Duration of Invasive Mechanical Ventilation. (A) Kaplan–Meier curves for the duration of invasive mechanical ventilation comparing corticosteroid group and non-corticosteroid group. (B) Kaplan–Meier curves for the duration of invasive mechanical ventilation comparing the pulse/semi-pulse group (initial dose ≥ 250 mg/day) and the standard dose group (initial dose < 250 mg/day) among patients receiving methylprednisolone. Cox proportional hazards model was used to calculate the hazard ratio and its 95% confidence interval for the treatment effect between groups. IQR, interquartile ranges; CI, confidence interval.