Validity of Self-Reported Pedometer Steps per Day in College Students |
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| Authors: | Brittany Star Overstreet Scott E Crouter George A Butler Cary M Springer David R Bassett |
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| Institution: | 1. Department of Kinesiology, Recreation and Sport Studies, University of Tennessee, Knoxville, Tennessee;2. Department of Biological Sciences, University of Tennessee, Knoxville, Tennessee;3. Department of Research Computing Support, University of Tennessee, Knoxville, Tennessee |
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| Abstract: | The purpose of this article was to examine the validity of self-reported pedometer steps/day. Forty-seven participants were provided a New Lifestyles NL-2000 (NL-2000; Lees Summit, MO, USA) pedometer and a physical activity (PA) diary for 3 weeks, but not informed of the data-storing capabilities. For weeks 2 and 3, each participant was given a step goal of 3,000 steps/day above week 1 average. A 2 × 3 repeated measures analysis of variance (ANOVA) was used to examine differences between reported steps/day. Bland–Altman plots assessed the mean bias and limits of agreement between reporting methods. Mean self-reported and NL-2000 steps/day were 9,264 ± 3,555 and 8,971 ± 3,590 steps/day (n = 26, p > .05). Mean biases were 216 ± 1,753 (week 1), –506 ± 1,355 (week 2), and –590 ± 1,360 (week 3) steps/day. Negative mean bias values indicate higher self-reported steps/day. Mean steps/day were similar between recording methods, but large differences were observed among individuals, suggesting self-reported steps/day may be valid for PA research at the population level, but not the individual level. |
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| Keywords: | accuracy monitoring physical activity tracking |
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