Article

The StepWatch activity monitor has not been validated on multiple indoor and
outdoor surfaces in a population using ambulation aids. The aims of this
technical report are to report on strategies to configure the StepWatch activity
monitor on subjects using a cane and to report the accuracy of both leg-mounted
and cane-mounted StepWatch devices on people ambulating over different surfaces
while using a cane. Sixteen subjects aged 67 to 85 yr
(mean 75.6) who regularly
use a cane for ambulation participated. StepWatch calibration was performed by
adjusting sensitivity and cadence. Following calibration optimization, accuracy
was tested on both the leg-mounted and cane-mounted devices on different
surfaces, including linoleum, sidewalk, grass, ramp, and stairs. The leg-mounted
device had an accuracy of 93.4% across all surfaces, while the cane-mounted
device had an aggregate accuracy of 84.7% across all surfaces. Accuracy of the
StepWatch on the stairs was significantly less accurate (p < 0.001) when
comparing surfaces using repeated measures analysis of variance. When monitoring
community mobility, placement of a StepWatch on a person and his/her ambulation
aid can accurately document both activity and device use.

Langue : ANGLAIS