Predicting the rate of oxygen consumption during the 3-minute constant-rate stair stepping and shuttle tests in people with chronic obstructive pulmonary disease

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Lewthwaite, HayleyUniversity of South Australia,McGill University (author)

Predicting the rate of oxygen consumption during the 3-minute constant-rate stair stepping and shuttle tests in people with chronic obstructive pulmonary disease

Article/chapterEnglish2020

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2020-05
AME Publishing Company,2020
10 s.

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LIBRIS-ID:oai:lup.lub.lu.se:221b3c47-7823-4af4-b5f2-d7b370f208be
https://lup.lub.lu.se/record/221b3c47-7823-4af4-b5f2-d7b370f208beURI
https://doi.org/10.21037/jtd.2020.03.13DOI

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Language:English
Summary in:English

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Subject category:ref swepub-contenttype

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Background: The 3-minute constant-rate stair stepping (3-min CRSST) and constant-speed shuttle tests (3-min CSST) were developed to assess breathlessness in response to a standardized exercise stimulus. Estimating the rate of oxygen consumption (V'O2) during these tests would assist clinicians to relate the stepping/shuttle speeds that elicit breathlessness to daily physical activities with a similar metabolic demand. This study: (I) developed equations to estimate the V'O2 of these tests in people with chronic obstructive pulmonary disease (COPD); and (II) compared the newly developed and American College of Sports Medicine (ACSM) metabolic equations for estimating the V'O2 of these tests. Methods: This study was a retrospective analysis of people with COPD who completed a 3-min CRSST (n=98) or 3-min CSST (n=69). Multivariate linear regression estimated predictors (alpha <0.05) of V'O2 to construct COPD-specific metabolic equations. The mean squared error (MSE) of the COPD-specific and ACSM equations was calculated and compared. Bland-Altman analyses evaluated level of agreement between measured and predicted V'O2 using each equation; limits of agreement (LoA) and patterns of bias were compared. Results: Stepping rate/shuttle speed and body mass were identified as significant predictors of V'O2. The MSE of the COPD-specific equations was 0.05 L.min?1 for both tests. Mean difference between measured and predicted V'O2 was 0.00 L.min?1 (95% LoA ?0.46, 0.46) and 0.00 L.min?1 (95% LoA ?0.44, 0.44) for the 3-min CRSST and 3-min CSST, respectively. For the ACSM metabolic equations, the MSE was 0.10 L.min?1 and 0.18 L.min?1 for the 3-min CRSST and 3-min CSST, respectively. The ACSM metabolic equations underestimated V'O2 of the 3-min CRSST by ?0.18 L.min?1 (95% LoA ?0.68, 0.32), and overestimated V'O2 of the 3-min CSST by 0.35 L.min?1 (95% LoA ?0.14, 0.84). Conclusions: This study presents metabolic equations to predict V'O2 of the 3-min CRSST and 3-min CSST for people with COPD that are more accurate than the ACSM metabolic equations.

Subject headings and genre

MEDICIN OCH HÄLSOVETENSKAP Klinisk medicin Lungmedicin och allergi hsv//swe
MEDICAL AND HEALTH SCIENCES Clinical Medicine Respiratory Medicine and Allergy hsv//eng
Activities of daily living
Breathlessness
Daily activities
Exertional breathlessness
Metabolic demand

Added entries (persons, corporate bodies, meetings, titles ...)

Koch, Emily M.McGill University (author)
Ekstrom, MagnusLund University,Lunds universitet,Lungmedicin, allergologi och palliativ medicin,Sektion II,Institutionen för kliniska vetenskaper, Lund,Medicinska fakulteten,Andfåddhet och kronisk andningssvikt,Forskargrupper vid Lunds universitet,Respiratory Medicine, Allergology, and Palliative Medicine,Section II,Department of Clinical Sciences, Lund,Faculty of Medicine,Breathlessness and chronic respiratory failure,Lund University Research Groups(Swepub:lu)med-mue (author)
Hamilton, AlanBoehringer Ingelheim (Canada) Ltd. (author)
Bourbeau, JeanMcGill University (author)
Maltais, FrancoisInstitut universitaire de cardiologie et de pneumologie de Québec (author)
Borel, BenoitUniversity of Limoges (author)
Ensen, DennisMcGill University (author)
University of South AustraliaMcGill University (creator_code:org_t)

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In:Journal of Thoracic Disease: AME Publishing Company12:5, s. 2489-24982072-14392077-6624

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MEDICAL AND HEALTH SCIENCES: MEDICAL AND HEAL ...; and Clinical Medicin ...; and Respiratory Medi ...

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