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Estimating Lung Volume During Cough: A Comparison of Respiratory Calibration Tasks and Methodologies.

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Title: Estimating Lung Volume During Cough: A Comparison of Respiratory Calibration Tasks and Methodologies.
Authors: Borders, James C.1 bordersj@bu.edu, Huber, Jessica E.2, Troche, Michelle S.3
Source: Journal of Speech, Language & Hearing Research. Sep2025, Vol. 68 Issue 9, p4290-4296. 7p.
Subject Terms: *Data analysis, *Movement disorders, *Experimental design, *Factor analysis, *Comparative studies, *Evaluation, Statistical power analysis, Plethysmography, Abdomen, Research funding, Disease duration, Spirometry, Cronbach's alpha, Respiration, Parkinson's disease, Descriptive statistics, Lung volume measurements, Statistics, Neuropsychological tests, Cough, Calibration, Airway (Anatomy), Confidence intervals
Geographic Terms: United States
Abstract: Purpose: Effective cough function requires sufficient respiratory support. To estimate lung volume, respiratory inductance plethysmography measures circumferential changes of the rib cage (RC) and abdomen (AB) during various behaviors, such as coughing. During speech breathing, the accuracy of these estimates is influenced by calibration tasks and analysis methods. Measurement error can introduce bias and confound results, yet the optimal approach for assessing lung volume during cough remains unclear. Method: Twenty participants with Parkinson's disease (Mage = 69 years; M disease duration = 11.39 years) completed three respiratory calibration tasks: (a) rest breathing, (b) cough-like breathing ("breathe in like you're going to cough, then breathe out forcefully without coughing"), and (c) single voluntary coughs ("cough hard one time"). Lung volume estimation error was calculated by comparing the estimated lung volume signal to the spirometry signal across tasks and task combinations. Error was also assessed across three analysis methods: the Banzett method (2:1 weighting for RC and AB) and two least squares methods--one correcting for both the RC and AB signals (LsqRC/AB) and another holding the AB constant (LsqRC). Results: Mean lung volume estimation error was 4.68% for LsqRC/AB, 9.88% for LsqRC, and 14.24% for the Banzett method. LsqRC/AB yielded significantly lower estimation error than both the LsqRC (p < .001, d = -1.14) and Banzett methods (p < .001, d = 1.69). Calibration task had no significant effect on estimation error (p = .889). Conclusions: The least squares method correcting for both the RC and AB (LsqRC/AB) provides the most precise lung volume estimates during cough. Error associated with the Banzett method exceeded previously reported values for speech breathing by more than 50%. Additional calibration tasks beyond rest breathing may not be necessary to meaningfully reduce lung volume error for cough measurement. Open Science Form: https://doi.org/10.23641/asha.29657360 [ABSTRACT FROM AUTHOR]
Copyright of Journal of Speech, Language & Hearing Research is the property of American Speech-Language-Hearing Association and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Education Research Complete
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  Data: Purpose: Effective cough function requires sufficient respiratory support. To estimate lung volume, respiratory inductance plethysmography measures circumferential changes of the rib cage (RC) and abdomen (AB) during various behaviors, such as coughing. During speech breathing, the accuracy of these estimates is influenced by calibration tasks and analysis methods. Measurement error can introduce bias and confound results, yet the optimal approach for assessing lung volume during cough remains unclear. Method: Twenty participants with Parkinson&#39;s disease (Mage = 69 years; M disease duration = 11.39 years) completed three respiratory calibration tasks: (a) rest breathing, (b) cough-like breathing (&quot;breathe in like you&#39;re going to cough, then breathe out forcefully without coughing&quot;), and (c) single voluntary coughs (&quot;cough hard one time&quot;). Lung volume estimation error was calculated by comparing the estimated lung volume signal to the spirometry signal across tasks and task combinations. Error was also assessed across three analysis methods: the Banzett method (2:1 weighting for RC and AB) and two least squares methods--one correcting for both the RC and AB signals (LsqRC/AB) and another holding the AB constant (LsqRC). Results: Mean lung volume estimation error was 4.68% for LsqRC/AB, 9.88% for LsqRC, and 14.24% for the Banzett method. LsqRC/AB yielded significantly lower estimation error than both the LsqRC (p &lt; .001, d = -1.14) and Banzett methods (p &lt; .001, d = 1.69). Calibration task had no significant effect on estimation error (p = .889). Conclusions: The least squares method correcting for both the RC and AB (LsqRC/AB) provides the most precise lung volume estimates during cough. Error associated with the Banzett method exceeded previously reported values for speech breathing by more than 50%. Additional calibration tasks beyond rest breathing may not be necessary to meaningfully reduce lung volume error for cough measurement. Open Science Form: https://doi.org/10.23641/asha.29657360 [ABSTRACT FROM AUTHOR]
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  Data: &lt;i&gt;Copyright of Journal of Speech, Language &amp; Hearing Research is the property of American Speech-Language-Hearing Association and its content may not be copied or emailed to multiple sites without the copyright holder&#39;s express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.&lt;/i&gt; (Copyright applies to all Abstracts.)
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      – Type: doi
        Value: 10.1044/2025_JSLHR-25-00237
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      – Code: eng
        Text: English
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        StartPage: 4290
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      – SubjectFull: Movement disorders
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      – SubjectFull: Airway (Anatomy)
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      – SubjectFull: Confidence intervals
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      – TitleFull: Estimating Lung Volume During Cough: A Comparison of Respiratory Calibration Tasks and Methodologies.
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              Text: Sep2025
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