@article{ref1,
title="Validity of 2 devices for measuring steps taken by older adults in assisted-living facilities",
journal="Journal of physical activity and health",
year="2008",
author="Bergman, Randall J. and Bassett, David R. Jr and Muthukrishnan, Suresh and Klein, Dena A.",
volume="5",
number="Suppl 1",
pages="S166-75",
abstract="BACKGROUND: This 2-part study examined validity of selected motion sensors for assessing physical activity in older adults residing in assisted-living communities. METHODS: Twenty-one older adults (mean age = 78.6 +/- 13.1 years) wore the StepWatch 3 Step Activity Monitor (SW3) and the Yamax Digi-Walker SW-200 pedometer (DW). Part I compared accuracy of these devices for measuring steps taken over 161 m. Part II compared devices over a 1-day (24-hour) period. RESULTS: In part I, the DW recorded 51.9% (r2 = -.08, P = .75) and the SW3 recorded 102.6% (r2 = .99, P < .001) of steps. In part II, the DW measured significantly fewer steps (1587 +/- 1057 steps) than did the SW3 (6420 +/- 3180 steps). CONCLUSIONS: The SW3 pedometer was more accurate in counting steps and recorded higher 24-hour step counts than the DW pedometer. Thus, the SW3 is a valid research instrument for monitoring activity in the assisted-living population.<p /> <p>Language: en</p>",
language="en",
issn="1543-3080",
doi="",
url="http://dx.doi.org/"
}