Objective physical activity assessment in patients with chronic organ failure: a validation study of a new single-unit activity monitor

Arch Phys Med Rehabil. 2011 Nov;92(11):1852-1857.e1. doi: 10.1016/j.apmr.2011.06.021.


Objective: To validate a new activity monitor (CAM) in patients with chronic organ failure during 1 hour of unconstrained activity assessment.

Design: A validation study in which participants wore a CAM (placed on the thigh) for 1 hour while they were videotaped. Participants were instructed to continue their normal daily routine at the rehabilitation center.

Setting: CIRO+, A Centre of Expertise for Chronic Organ Failure.

Participants: Chronic organ failure patients (N=10) with a large range of functional exercise capacity.

Interventions: Not applicable.

Main outcome measure: Agreement in time spent on activities and postures according to video and CAM.

Results: Cohen kappa coefficients for transient events resulted in an almost perfect agreement (0.85 ± 0.08) between the CAM and video.

Conclusions: The CAM is a promising single-sensor unobtrusive tool for providing accurate data on the type and duration of daily activities in the home environment of patients with chronic organ failure.

MeSH terms

  • Activities of Daily Living
  • Adult
  • Aged
  • Bicycling
  • Chronic Disease
  • Exercise / physiology*
  • Heart Failure / physiopathology*
  • Humans
  • Male
  • Middle Aged
  • Monitoring, Physiologic / methods*
  • Physical Therapy Modalities
  • Pulmonary Disease, Chronic Obstructive / physiopathology*
  • Reproducibility of Results
  • Walking