title: Assessing physical activity in children with asthma: convergent validity between accelerometer and electronic diary data.
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.
authors: Department of Psychology and Social Behavior, University of California-Irvine, CA 92612, USA.
authors: Josh N
authors: JN
authors: Floro
authors: Genevieve E
authors: GE
authors: Dunton
authors: Ralph J
authors: RJ
authors: Delfino
mesh_terms: D000293:Adolescent; D001249:Asthma; D002648:Child; D034201:Computers, Handheld; D015444:Exercise; D005260:Female; D006801:Humans; D008297:Male; D018670:Monitoring, Ambulatory / Q000295:instrumentation*; D012129:Respiratory Function Tests; D013147:Spirometry / Q000295:instrumentation; D014584:User-Computer Interface