Validity of six activity monitors in chronic obstructive pulmonary disease: a comparison with indirect calorimetry.

Reduced physical activity is an important feature of Chronic Obstructive Pulmonary Disease (COPD). Various activity monitors are available but their validity is poorly established. The aim was to evaluate the validity of six monitors in patients with COPD. We hypothesized triaxial monitors to be mor...

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Autores principales:	Hans Van Remoortel, Yogini Raste, Zafeiris Louvaris, Santiago Giavedoni, Chris Burtin, Daniel Langer, Frederick Wilson, Roberto Rabinovich, Ioannis Vogiatzis, Nicholas S Hopkinson, Thierry Troosters, PROactive consortium
Formato:	article
Lenguaje:	EN
Publicado:	Public Library of Science (PLoS) 2012
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/5625ae3c8f444efdbb8b946e96128660
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spelling	oai:doaj.org-article:5625ae3c8f444efdbb8b946e961286602021-11-18T07:14:47ZValidity of six activity monitors in chronic obstructive pulmonary disease: a comparison with indirect calorimetry.1932-620310.1371/journal.pone.0039198https://doaj.org/article/5625ae3c8f444efdbb8b946e961286602012-01-01T00:00:00Zhttps://www.ncbi.nlm.nih.gov/pmc/articles/pmid/22745715/?tool=EBIhttps://doaj.org/toc/1932-6203Reduced physical activity is an important feature of Chronic Obstructive Pulmonary Disease (COPD). Various activity monitors are available but their validity is poorly established. The aim was to evaluate the validity of six monitors in patients with COPD. We hypothesized triaxial monitors to be more valid compared to uniaxial monitors. Thirty-nine patients (age 68±7 years, FEV(1) 54±18%predicted) performed a one-hour standardized activity protocol. Patients wore 6 monitors (Kenz Lifecorder (Kenz), Actiwatch, RT3, Actigraph GT3X (Actigraph), Dynaport MiniMod (MiniMod), and SenseWear Armband (SenseWear)) as well as a portable metabolic system (Oxycon Mobile). Validity was evaluated by correlation analysis between indirect calorimetry (VO(2)) and the monitor outputs: Metabolic Equivalent of Task [METs] (SenseWear, MiniMod), activity counts (Actiwatch), vector magnitude units (Actigraph, RT3) and arbitrary units (Kenz) over the whole protocol and slow versus fast walking. Minute-by-minute correlations were highest for the MiniMod (r = 0.82), Actigraph (r = 0.79), SenseWear (r = 0.73) and RT3 (r = 0.73). Over the whole protocol, the mean correlations were best for the SenseWear (r = 0.76), Kenz (r = 0.52), Actigraph (r = 0.49) and MiniMod (r = 0.45). The MiniMod (r = 0.94) and Actigraph (r = 0.88) performed better in detecting different walking speeds. The Dynaport MiniMod, Actigraph GT3X and SenseWear Armband (all triaxial monitors) are the most valid monitors during standardized physical activities. The Dynaport MiniMod and Actigraph GT3X discriminate best between different walking speeds.Hans Van RemoortelYogini RasteZafeiris LouvarisSantiago GiavedoniChris BurtinDaniel LangerFrederick WilsonRoberto RabinovichIoannis VogiatzisNicholas S HopkinsonThierry TroostersPROactive consortiumPublic Library of Science (PLoS)articleMedicineRScienceQENPLoS ONE, Vol 7, Iss 6, p e39198 (2012)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Hans Van Remoortel Yogini Raste Zafeiris Louvaris Santiago Giavedoni Chris Burtin Daniel Langer Frederick Wilson Roberto Rabinovich Ioannis Vogiatzis Nicholas S Hopkinson Thierry Troosters PROactive consortium Validity of six activity monitors in chronic obstructive pulmonary disease: a comparison with indirect calorimetry.
description	Reduced physical activity is an important feature of Chronic Obstructive Pulmonary Disease (COPD). Various activity monitors are available but their validity is poorly established. The aim was to evaluate the validity of six monitors in patients with COPD. We hypothesized triaxial monitors to be more valid compared to uniaxial monitors. Thirty-nine patients (age 68±7 years, FEV(1) 54±18%predicted) performed a one-hour standardized activity protocol. Patients wore 6 monitors (Kenz Lifecorder (Kenz), Actiwatch, RT3, Actigraph GT3X (Actigraph), Dynaport MiniMod (MiniMod), and SenseWear Armband (SenseWear)) as well as a portable metabolic system (Oxycon Mobile). Validity was evaluated by correlation analysis between indirect calorimetry (VO(2)) and the monitor outputs: Metabolic Equivalent of Task [METs] (SenseWear, MiniMod), activity counts (Actiwatch), vector magnitude units (Actigraph, RT3) and arbitrary units (Kenz) over the whole protocol and slow versus fast walking. Minute-by-minute correlations were highest for the MiniMod (r = 0.82), Actigraph (r = 0.79), SenseWear (r = 0.73) and RT3 (r = 0.73). Over the whole protocol, the mean correlations were best for the SenseWear (r = 0.76), Kenz (r = 0.52), Actigraph (r = 0.49) and MiniMod (r = 0.45). The MiniMod (r = 0.94) and Actigraph (r = 0.88) performed better in detecting different walking speeds. The Dynaport MiniMod, Actigraph GT3X and SenseWear Armband (all triaxial monitors) are the most valid monitors during standardized physical activities. The Dynaport MiniMod and Actigraph GT3X discriminate best between different walking speeds.
format	article
author	Hans Van Remoortel Yogini Raste Zafeiris Louvaris Santiago Giavedoni Chris Burtin Daniel Langer Frederick Wilson Roberto Rabinovich Ioannis Vogiatzis Nicholas S Hopkinson Thierry Troosters PROactive consortium
author_facet	Hans Van Remoortel Yogini Raste Zafeiris Louvaris Santiago Giavedoni Chris Burtin Daniel Langer Frederick Wilson Roberto Rabinovich Ioannis Vogiatzis Nicholas S Hopkinson Thierry Troosters PROactive consortium
author_sort	Hans Van Remoortel
title	Validity of six activity monitors in chronic obstructive pulmonary disease: a comparison with indirect calorimetry.
title_short	Validity of six activity monitors in chronic obstructive pulmonary disease: a comparison with indirect calorimetry.
title_full	Validity of six activity monitors in chronic obstructive pulmonary disease: a comparison with indirect calorimetry.
title_fullStr	Validity of six activity monitors in chronic obstructive pulmonary disease: a comparison with indirect calorimetry.
title_full_unstemmed	Validity of six activity monitors in chronic obstructive pulmonary disease: a comparison with indirect calorimetry.
title_sort	validity of six activity monitors in chronic obstructive pulmonary disease: a comparison with indirect calorimetry.
publisher	Public Library of Science (PLoS)
publishDate	2012
url	https://doaj.org/article/5625ae3c8f444efdbb8b946e96128660
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Validity of six activity monitors in chronic obstructive pulmonary disease: a comparison with indirect calorimetry.

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