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Accuracy of uniaxial accelerometer in chronic obstructive pulmonary disease

Marilyn L. Moy, MD, MSc, et al.

Figure. ActiHealth accelerometer

Wearable sensors have been developed and used in nondisabled adults, but little is known about their accuracy in patients with chronic disease. We used the ActiHealth accelerometer, which measures step counts, in subjects with chronic obstructive pulmonary disease (COPD). The ActiHealth accelerometer has acceptable intra- and interdevice coefficients of variation. It is highly accurate in nondisabled subjects; however, the accuracy declines in subjects with COPD. Usual walking speed is the most important predictor of accuracy in COPD. Prior to using the ActiHealth accelerometer, researchers and clinicians should assess walking speed and accuracy in each subject with COPD.

Volume 45 Number 4, 2008
   Pages 611 — 618

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