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Validation of two activity monitors in patients with COPD
  1. D Langer1,2,
  2. R Gosselink1,2,
  3. R Sena2,
  4. C Burtin1,2,
  5. M Decramer1,2,
  6. T Troosters1,2
  1. 1
    Respiratory Rehabilitation and Respiratory Division, UZ Gasthuisberg, Leuven, Belgium
  2. 2
    Faculty of Kinesiology and Rehabilitation Sciences, Katholieke Universiteit Leuven, Leuven, Belgium
  1. Dr T Troosters, UZ Gasthuisberg, Respiratory Division, Herestraat 49, B-3000 Leuven, Belgium; thierry.troosters{at}med.kuleuven.be

https://doi.org/10.1136/thx.2008.112102

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    Physical activity in daily life is increasingly used as an outcome measure in chronic respiratory disease.1 Valid and user-friendly instruments are needed to quantify daily activity.1 2 The DynaPort activity monitor (McRoberts, The Hague, The Netherlands) has been validated and used in patients with chronic obstructive pulmonary disease (COPD).3 4 The device is, however, technically difficult to handle and, due to its size (12.5×9.5×3 cm, 375 g), it is always noticeable. We therefore validated two smaller activity monitors in a sample of 10 patients with COPD (mean (SD) forced expiratory volume in 1 s 49 (16)% predicted; mean (SD) age 65 (8) years) and 10 healthy elderly volunteers (mean (SD) age 65 (9) years). Detailed characteristics of the study subjects are summarised in table 1 in the online supplement.

    All patients simultaneously wore the DynaPort, the SenseWear Pro (SenseWear, Body Media, Pittsburgh, USA) activity monitor (8.5×5.0×1.5 cm, 85 g), …

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    Footnotes

    • ▸ Additional data are published online only at http://thorax.bmj.com/content/vol64/issue7

    • Funding: This research was funded by Research Foundation Flanders grants G0523.06 and G05989.09

    • Competing interests: None.

    • DL and CB are doctoral fellows of the Research Foundation Flanders.