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. 2023 Nov 18;13:20196. doi: 10.1038/s41598-023-46561-7

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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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Comparison of the STQV in patients with cough. The STQV pre-treatment and immediately after the onset of coughing in patients who developed cough during MAC (n = 14) was 0.042 ± 0.04 and 0.342 ± 0.038, respectively, indicating that the STQV was significantly higher immediately after the onset of coughing (P < 0.002 [95% CI − 0.47 to − 0.13]. The horizontal line indicates the mean, and error bar indicate standard deviation; analysis was performed using the student’s t-test. STQV stridor quantitative value.