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Assessing physical activity in children with asthma: convergent validity between accelerometer and electronic diary
Josh N Floro1, Genevieve E Dunton, Ralph J Delfino
1Department of Psychology and Social Behavior, University of California-Irvine, CA 92612, USA.
Abstract:
Convergent validity of accelerometer and electronic diary physical activity data was assessed in children with asthma. Sixty-two participants, ages 9-18 years, wore an accelerometer and reported their physical activity level in quarter-hour segments every 2 hr using the Ambulatory Diary Assessment (ADA). Moderate validity was found between physical activity data from accelerometers and ADA (average individual participant Spearman r = .48, SD = 0.13). Within-participant accelerometer estimates for ADA sleep, rest, and light activity were different from each other and from higher activity (mixed model p < .0001), but moderate did not differ from strenuous activity (p = .70). Moderate validity between accelerometer and electronic diary data supports the use of ADA with short-term recall to capture gross changes in daily activity.
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