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An Experimental Study on the Validity and Reliability of a Smartphone Application to Acquire Temporal Variables during the Single Sit-to-Stand Test with Older Adults

Smartphone sensors have often been proposed as pervasive measurement systems to assess mobility in older adults due to their ease of use and low-cost. This study analyzes a smartphone-based application’s validity and reliability to quantify temporal variables during the single sit-to-stand test with...

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Autores principales: Marques, Diogo Luís, Neiva, Henrique Pereira, Pires, Ivan Miguel, Zdravevski, Eftim, Mihajlov, Martin, Garcia, Nuno M., Ruiz-Cárdenas, Juan Diego, Marinho, Daniel Almeida, Marques, Mário Cardoso
Formato: Online Artículo Texto
Lenguaje:English
Publicado: MDPI 2021
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8000467/
https://www.ncbi.nlm.nih.gov/pubmed/33803927
http://dx.doi.org/10.3390/s21062050
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author Marques, Diogo Luís
Neiva, Henrique Pereira
Pires, Ivan Miguel
Zdravevski, Eftim
Mihajlov, Martin
Garcia, Nuno M.
Ruiz-Cárdenas, Juan Diego
Marinho, Daniel Almeida
Marques, Mário Cardoso
author_facet Marques, Diogo Luís
Neiva, Henrique Pereira
Pires, Ivan Miguel
Zdravevski, Eftim
Mihajlov, Martin
Garcia, Nuno M.
Ruiz-Cárdenas, Juan Diego
Marinho, Daniel Almeida
Marques, Mário Cardoso
author_sort Marques, Diogo Luís
collection PubMed
description Smartphone sensors have often been proposed as pervasive measurement systems to assess mobility in older adults due to their ease of use and low-cost. This study analyzes a smartphone-based application’s validity and reliability to quantify temporal variables during the single sit-to-stand test with institutionalized older adults. Forty older adults (20 women and 20 men; 78.9 ± 8.6 years) volunteered to participate in this study. All participants performed the single sit-to-stand test. Each sit-to-stand repetition was performed after an acoustic signal was emitted by the smartphone app. All data were acquired simultaneously with a smartphone and a digital video camera. The measured temporal variables were stand-up time and total time. The relative reliability and systematic bias inter-device were assessed using the intraclass correlation coefficient (ICC) and Bland-Altman plots. In contrast, absolute reliability was assessed using the standard error of measurement and coefficient of variation (CV). Inter-device concurrent validity was assessed through correlation analysis. The absolute percent error (APE) and the accuracy were also calculated. The results showed excellent reliability (ICC = 0.92–0.97; CV = 1.85–3.03) and very strong relationships inter-devices for the stand-up time (r = 0.94) and the total time (r = 0.98). The APE was lower than 6%, and the accuracy was higher than 94%. Based on our data, the findings suggest that the smartphone application is valid and reliable to collect the stand-up time and total time during the single sit-to-stand test with older adults.
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spelling pubmed-80004672021-03-28 An Experimental Study on the Validity and Reliability of a Smartphone Application to Acquire Temporal Variables during the Single Sit-to-Stand Test with Older Adults Marques, Diogo Luís Neiva, Henrique Pereira Pires, Ivan Miguel Zdravevski, Eftim Mihajlov, Martin Garcia, Nuno M. Ruiz-Cárdenas, Juan Diego Marinho, Daniel Almeida Marques, Mário Cardoso Sensors (Basel) Article Smartphone sensors have often been proposed as pervasive measurement systems to assess mobility in older adults due to their ease of use and low-cost. This study analyzes a smartphone-based application’s validity and reliability to quantify temporal variables during the single sit-to-stand test with institutionalized older adults. Forty older adults (20 women and 20 men; 78.9 ± 8.6 years) volunteered to participate in this study. All participants performed the single sit-to-stand test. Each sit-to-stand repetition was performed after an acoustic signal was emitted by the smartphone app. All data were acquired simultaneously with a smartphone and a digital video camera. The measured temporal variables were stand-up time and total time. The relative reliability and systematic bias inter-device were assessed using the intraclass correlation coefficient (ICC) and Bland-Altman plots. In contrast, absolute reliability was assessed using the standard error of measurement and coefficient of variation (CV). Inter-device concurrent validity was assessed through correlation analysis. The absolute percent error (APE) and the accuracy were also calculated. The results showed excellent reliability (ICC = 0.92–0.97; CV = 1.85–3.03) and very strong relationships inter-devices for the stand-up time (r = 0.94) and the total time (r = 0.98). The APE was lower than 6%, and the accuracy was higher than 94%. Based on our data, the findings suggest that the smartphone application is valid and reliable to collect the stand-up time and total time during the single sit-to-stand test with older adults. MDPI 2021-03-15 /pmc/articles/PMC8000467/ /pubmed/33803927 http://dx.doi.org/10.3390/s21062050 Text en © 2021 by the authors. Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).
spellingShingle Article
Marques, Diogo Luís
Neiva, Henrique Pereira
Pires, Ivan Miguel
Zdravevski, Eftim
Mihajlov, Martin
Garcia, Nuno M.
Ruiz-Cárdenas, Juan Diego
Marinho, Daniel Almeida
Marques, Mário Cardoso
An Experimental Study on the Validity and Reliability of a Smartphone Application to Acquire Temporal Variables during the Single Sit-to-Stand Test with Older Adults
title An Experimental Study on the Validity and Reliability of a Smartphone Application to Acquire Temporal Variables during the Single Sit-to-Stand Test with Older Adults
title_full An Experimental Study on the Validity and Reliability of a Smartphone Application to Acquire Temporal Variables during the Single Sit-to-Stand Test with Older Adults
title_fullStr An Experimental Study on the Validity and Reliability of a Smartphone Application to Acquire Temporal Variables during the Single Sit-to-Stand Test with Older Adults
title_full_unstemmed An Experimental Study on the Validity and Reliability of a Smartphone Application to Acquire Temporal Variables during the Single Sit-to-Stand Test with Older Adults
title_short An Experimental Study on the Validity and Reliability of a Smartphone Application to Acquire Temporal Variables during the Single Sit-to-Stand Test with Older Adults
title_sort experimental study on the validity and reliability of a smartphone application to acquire temporal variables during the single sit-to-stand test with older adults
topic Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8000467/
https://www.ncbi.nlm.nih.gov/pubmed/33803927
http://dx.doi.org/10.3390/s21062050
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