Cross-Validation of Predictive Equation for Cardiorespiratory Fitness by Modified Shuttle Walk Test in Adults with Schizophrenia: A Secondary Analysis of the CORTEX-SP Study

Cardiorespiratory fitness (CRF) can be direct or estimated from different field tests. The Modified Shuttle Walk Test (MSWT) is suitable for all levels of function, allowing a peak response to be elicited. Therefore, we aimed (1) to validate the equation presented in the original study by Singh et a...

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Autores principales: Mikel Tous-Espelosin, Sonia Ruiz de Azua, Nagore Iriarte-Yoller, Pedro M. Sanchez, Edorta Elizagarate, Agurne Sampedro, Sara Maldonado-Martín
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spelling oai:doaj.org-article:4bf10c4077fc41158cc27254470e3caf2021-11-11T16:30:28ZCross-Validation of Predictive Equation for Cardiorespiratory Fitness by Modified Shuttle Walk Test in Adults with Schizophrenia: A Secondary Analysis of the CORTEX-SP Study10.3390/ijerph1821113901660-46011661-7827https://doaj.org/article/4bf10c4077fc41158cc27254470e3caf2021-10-01T00:00:00Zhttps://www.mdpi.com/1660-4601/18/21/11390https://doaj.org/toc/1661-7827https://doaj.org/toc/1660-4601Cardiorespiratory fitness (CRF) can be direct or estimated from different field tests. The Modified Shuttle Walk Test (MSWT) is suitable for all levels of function, allowing a peak response to be elicited. Therefore, we aimed (1) to validate the equation presented in the original study by Singh et al. for evaluating the relationship between MSWT with peak oxygen uptake (VO<sub>2peak</sub>) in adults with schizophrenia (SZ), (2) to develop a new equation for the MSWT to predict VO<sub>2peak</sub>, and (3) to validate the new equation. Participants (N = 144, 41.3 ± 10.2 years old) with SZ performed a direct measurement of VO<sub>2peak</sub> through a cardiopulmonary exercise test and the MSWT. A new equation incorporating resting heart rate, body mass index, and distance from MSWT (R<sup>2</sup> = 0.617; adjusted R<sup>2</sup> = 0.60; <i>p</i> < 0.001) performs better than the Singh et al. equation (R<sup>2</sup> = 0.57; adjusted R<sup>2</sup> = 0.57; <i>p</i> < 0.001) to estimate VO<sub>2peak</sub> for the studied population. The <i>posteriori</i> cross-validation method confirmed the model’s stability (R<sup>2</sup> = 0.617 vs. 0.626). The findings of the current study support the validity of the new regression equation incorporating resting heart rate, body mass index, and distance from MSWT to predict VO<sub>2peak</sub> for assessment of CRF in people with SZ.Mikel Tous-EspelosinSonia Ruiz de AzuaNagore Iriarte-YollerPedro M. SanchezEdorta ElizagarateAgurne SampedroSara Maldonado-MartínMDPI AGarticleassessmentequation for estimationfield testpeak oxygen uptakevalidationMedicineRENInternational Journal of Environmental Research and Public Health, Vol 18, Iss 11390, p 11390 (2021)
institution DOAJ
collection DOAJ
language EN
topic assessment
equation for estimation
field test
peak oxygen uptake
validation
Medicine
R
spellingShingle assessment
equation for estimation
field test
peak oxygen uptake
validation
Medicine
R
Mikel Tous-Espelosin
Sonia Ruiz de Azua
Nagore Iriarte-Yoller
Pedro M. Sanchez
Edorta Elizagarate
Agurne Sampedro
Sara Maldonado-Martín
Cross-Validation of Predictive Equation for Cardiorespiratory Fitness by Modified Shuttle Walk Test in Adults with Schizophrenia: A Secondary Analysis of the CORTEX-SP Study
description Cardiorespiratory fitness (CRF) can be direct or estimated from different field tests. The Modified Shuttle Walk Test (MSWT) is suitable for all levels of function, allowing a peak response to be elicited. Therefore, we aimed (1) to validate the equation presented in the original study by Singh et al. for evaluating the relationship between MSWT with peak oxygen uptake (VO<sub>2peak</sub>) in adults with schizophrenia (SZ), (2) to develop a new equation for the MSWT to predict VO<sub>2peak</sub>, and (3) to validate the new equation. Participants (N = 144, 41.3 ± 10.2 years old) with SZ performed a direct measurement of VO<sub>2peak</sub> through a cardiopulmonary exercise test and the MSWT. A new equation incorporating resting heart rate, body mass index, and distance from MSWT (R<sup>2</sup> = 0.617; adjusted R<sup>2</sup> = 0.60; <i>p</i> < 0.001) performs better than the Singh et al. equation (R<sup>2</sup> = 0.57; adjusted R<sup>2</sup> = 0.57; <i>p</i> < 0.001) to estimate VO<sub>2peak</sub> for the studied population. The <i>posteriori</i> cross-validation method confirmed the model’s stability (R<sup>2</sup> = 0.617 vs. 0.626). The findings of the current study support the validity of the new regression equation incorporating resting heart rate, body mass index, and distance from MSWT to predict VO<sub>2peak</sub> for assessment of CRF in people with SZ.
format article
author Mikel Tous-Espelosin
Sonia Ruiz de Azua
Nagore Iriarte-Yoller
Pedro M. Sanchez
Edorta Elizagarate
Agurne Sampedro
Sara Maldonado-Martín
author_facet Mikel Tous-Espelosin
Sonia Ruiz de Azua
Nagore Iriarte-Yoller
Pedro M. Sanchez
Edorta Elizagarate
Agurne Sampedro
Sara Maldonado-Martín
author_sort Mikel Tous-Espelosin
title Cross-Validation of Predictive Equation for Cardiorespiratory Fitness by Modified Shuttle Walk Test in Adults with Schizophrenia: A Secondary Analysis of the CORTEX-SP Study
title_short Cross-Validation of Predictive Equation for Cardiorespiratory Fitness by Modified Shuttle Walk Test in Adults with Schizophrenia: A Secondary Analysis of the CORTEX-SP Study
title_full Cross-Validation of Predictive Equation for Cardiorespiratory Fitness by Modified Shuttle Walk Test in Adults with Schizophrenia: A Secondary Analysis of the CORTEX-SP Study
title_fullStr Cross-Validation of Predictive Equation for Cardiorespiratory Fitness by Modified Shuttle Walk Test in Adults with Schizophrenia: A Secondary Analysis of the CORTEX-SP Study
title_full_unstemmed Cross-Validation of Predictive Equation for Cardiorespiratory Fitness by Modified Shuttle Walk Test in Adults with Schizophrenia: A Secondary Analysis of the CORTEX-SP Study
title_sort cross-validation of predictive equation for cardiorespiratory fitness by modified shuttle walk test in adults with schizophrenia: a secondary analysis of the cortex-sp study
publisher MDPI AG
publishDate 2021
url https://doaj.org/article/4bf10c4077fc41158cc27254470e3caf
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