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Monitoring Accuracy of StepWatch Devices on Cane Users

This study by Deborah Michael Wendland, PT, DPT, CPed, and Stephen H. Sprigle, PhD, PT, aims to report on the accuracy of leg-mounted and cane-mounted StepWatch devices for people ambulating on various surfaces while using a cane. The research involved 16 subjects aged 67 to 85, regular cane users, with StepWatch calibration and testing on different surfaces like linoleum, sidewalk, grass, ramps, and stairs. Results showed leg-mounted devices were more accurate (93.4%) compared to cane-mounted devices (84.7%) on all surfaces, with the latter being less accurate on stairs. This study indicates that monitoring community mobility and activity accurately requires proper placement of StepWatch devices on individuals using ambulation aids. Physical activity monitoring is essential for overall health and longevity, especially among older adults.

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Monitoring Accuracy of StepWatch Devices on Cane Users

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  1. Activity monitor accuracy in persons using canes Deborah Michael Wendland, PT, DPT, CPed; Stephen H. Sprigle, PhD, PT

  2. Aim • Report accuracy of leg-mounted and cane-mounted StepWatch devices on people ambulating over different surfaces while using a cane. • Relevance • Physical activity is important for health and associated with decreased all-cause mortality. • Assistive device use has increased to facilitate increased independence with activities of daily living.

  3. Method • 16 subjects (67 to 85 yr old) who regularly use a cane for ambulation participated. • StepWatch calibration was performed by adjusting sensitivity and cadence. • Following calibration optimization, accuracy was tested on: • Leg-mounted vs cane-mounted devices. • Different surfaces, including linoleum, sidewalk, grass, ramp, and stairs.

  4. Results • Accuracy: • Leg-mounted:93.4% all surfaces. • Cane-mounted:84.7% all surfaces. • Significantly less accurate on stairs. Gray bars = leg-mounted. Black bars = cane-mounted.

  5. Conclusion • When monitoring community mobility, placement of StepWatch on a person and his or her ambulation aid can accurately document both activity and device use.

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