Validity of physical activity monitors during daily life in patients with COPD.

R.A. Rabinovich*, Z. Louvaris, Y. Raste, D. Langer, H.V. Remoortel, S. Giavedoni, C. Burtin, E.M. Regueiro, I. Vogiatzis, N.S. Hopkinson, M.I. Polkey, F.J. Wilson, W. MacNee, K.R. Westerterp, T. Troosters

*Corresponding author for this work

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Symptoms during physical activity (PA) and physical inactivity are COPD. Our aim was to evaluate the validity and usability of six activity in patients with COPD against the doubly labelled water (DLW) indirect calorimetry method.Eighty COPD patients (age 68+/-6 years, FEV1 57+/-19% predicted) recruited in four centres each wore simultaneously three or six commercially available monitors validated in chronic conditions for consecutive days. A priori validity criteria were defined. These ability to explain total energy expenditure (TEE) variance through regression analysis, using TEE as the dependent variable with total body (TBW) plus several PA monitors outputs as independent variables; and with DLW measured activity energy expenditure (AEE).The Actigraph GT3X DynaPort MoveMonitor best explained the majority of the TEE variance not explained by TBW (53% and 70% respectively) and showed the most correlations with AEE (r=0.71 p<0.001, r=0.70 p<0.0001, of this study should guide users in choosing valid activity monitors for or for clinical use in patients with chronic diseases such as COPD.
Original languageEnglish
Pages (from-to)1205-1215
JournalEuropean Respiratory Journal
Issue number5
Publication statusPublished - 1 Jan 2013

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