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Concordance Between Accelerometer-Measured and Self-Reported Physical Activity and Sedentary Time in Adults with
Daehyoung Lee1, Georgia C Frey2, Donetta J Cothran2
1Department of Applied Human Sciences, University of Minnesota Duluth, MN, Duluth, USA. Lee03284@d.umn.edu.
Abstract:
This study examined the concordance between accelerometry-measured and self-reported physical activity (PA) and sedentary time in adults with autism. Twenty-four participants wore an ActiGraph GT3X + accelerometer for seven consecutive days and completed the International Physical Activity Questionnaire-Short Form (IPAQ-SF) on the last day of their study participation. Bland-Altman plots assessed the magnitude of agreement between the two measures. Nearly 80% of the participants accumulated the recommended ≥ 150 min of moderate to vigorous PA (MVPA)/week, but were also sedentary for over nine hours/day according to accelerometry data. Findings showed that adults with autism tended to overreport MVPA (b = 1.606, p < 0.01) and underreport sedentary time (b = 1.161, p = 0.03) via the IPAQ-SF, as compared to objective measurements.
