Comparison of 3 accelerometer data reduction approaches, step counts, and 2 self-report measures for estimating physical activity in free-living adults

Meyer, M. Renee Umstattd, Baller, Stephanie L., Mitchell, Shawn M., & Trost, Stewart G. (2013) Comparison of 3 accelerometer data reduction approaches, step counts, and 2 self-report measures for estimating physical activity in free-living adults. Journal of Physical Activity and Health, 10(7), pp. 1068-1074.

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Accelerometers have become one of the most common methods of measuring physical activity (PA). Thus, validity of accelerometer data reduction approaches remains an important research area. Yet, few studies directly compare data reduction approaches and other PA measures in free-living samples.


To compare PA estimates provided by 3 accelerometer data reduction approaches, steps, and 2 self-reported estimates: Crouter's 2-regression model, Crouter's refined 2-regression model, the weighted cut-point method adopted in the National Health and Nutrition Examination Survey (NHANES; 2003-2004 and 2005-2006 cycles), steps, IPAQ, and 7-day PA recall.


A worksite sample (N = 87) completed online-surveys and wore ActiGraph GT1M accelerometers and pedometers (SW-200) during waking hours for 7 consecutive days. Daily time spent in sedentary, light, moderate, and vigorous intensity activity and percentage of participants meeting PA recommendations were calculated and compared.


Crouter's 2-regression (161.8 +/- 52.3 minutes/day) and refined 2-regression (137.6 +/- 40.3 minutes/day) models provided significantly higher estimates of moderate and vigorous PA and proportions of those meeting PA recommendations (91% and 92%, respectively) as compared with the NHANES weighted cut-point method (39.5 +/- 20.2 minutes/day, 18%). Differences between other measures were also significant.


When comparing 3 accelerometer cut-point methods, steps, and self-report measures, estimates of PA participation vary substantially.

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3 citations in Scopus
1 citations in Web of Science®
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ID Code: 71692
Item Type: Journal Article
Refereed: Yes
Additional Information: ISI Document Delivery No.: 232RD
Times Cited: 0
Cited Reference Count: 14
Meyer, M. Renee Umstattd Baller, Stephanie L. Mitchell, Shawn M. Trost, Stewart G.
Human kinetics publ inc
Keywords: Crouter's Two-Regression Model, Crouter's Refined Two-Regression Model, NHANES weighted cut-point, pedometer, IPAQ, 7-day physical activity, recall, energy-expenditure, 2-regression model, public-health
ISSN: 1543-3080
Divisions: Current > QUT Faculties and Divisions > Faculty of Health
Deposited On: 15 May 2014 04:03
Last Modified: 16 May 2014 03:01

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