Comparison of accelerometer cut-points for estimating physical activity in frail older adults
ISPAH ePoster Library. Baardstu H. 10/15/18; 225338; 521
Ms. Hilde Baardstu
Ms. Hilde Baardstu
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Abstract
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Abstract BackgroundAccelerometers are frequently used to estimate physical activity (PA). However, the impact of using different cut-points for estimating time spent in different intensities have not been examined properly amongst frail community-dwelling older adults. The aim of this study was to describe level of PA in frail community-dwelling older adults using different cut-points, and determine prevalence of meeting current PA recommendations based on these cut-points.MethodsPA was measured with accelerometer (ActiGraph GT3X) in 93 older adults (mean age 84.2±7.5yr.) for 14 consecutive days. Cut-points from Troiano, Matthews and Swartz were used to define time spent in low PA (LPA) and moderate-to-vigorous PA (MVPA) (LPA: 100-2019, 100-760 and 100-573 counts/min, MVPA: ≥2020, ≥760 and ≥574 counts/min, respectively). Achieving national PA recommendations was defined as accumulating either ≥150min MVPA/week in total or in bouts of ≥10min.ResultsOverall, mean counts per day was 73.5±51.1. Time spent in LPA was 86.34±49.02, 69.71±37.6 and 61.62±32.22 min/day using Troiano, Matthew and Swartz cut-points. For MVPA the same cut-points showed 3.95±6.76, 20.58±18.71 and 28.67±23.18 min/day respectively. Prevalence of meeting PA recommendations was 2.2, 34.4 and 49.5% respectively. Conclusion Time spent in LPA, MVPA and prevalence of meeting PA recommendations were greatly influenced by using different cut-points. This highlights the methodological issues related to choosing the appropriate analytic method for measurement of PA in frail older adults. Thus, more attention should be directed towards finding the most appropriate way of estimating PA in community-dwelling, frail older adults. External funding details The study is founded by Regional Research Funds Norway
Abstract BackgroundAccelerometers are frequently used to estimate physical activity (PA). However, the impact of using different cut-points for estimating time spent in different intensities have not been examined properly amongst frail community-dwelling older adults. The aim of this study was to describe level of PA in frail community-dwelling older adults using different cut-points, and determine prevalence of meeting current PA recommendations based on these cut-points.MethodsPA was measured with accelerometer (ActiGraph GT3X) in 93 older adults (mean age 84.2±7.5yr.) for 14 consecutive days. Cut-points from Troiano, Matthews and Swartz were used to define time spent in low PA (LPA) and moderate-to-vigorous PA (MVPA) (LPA: 100-2019, 100-760 and 100-573 counts/min, MVPA: ≥2020, ≥760 and ≥574 counts/min, respectively). Achieving national PA recommendations was defined as accumulating either ≥150min MVPA/week in total or in bouts of ≥10min.ResultsOverall, mean counts per day was 73.5±51.1. Time spent in LPA was 86.34±49.02, 69.71±37.6 and 61.62±32.22 min/day using Troiano, Matthew and Swartz cut-points. For MVPA the same cut-points showed 3.95±6.76, 20.58±18.71 and 28.67±23.18 min/day respectively. Prevalence of meeting PA recommendations was 2.2, 34.4 and 49.5% respectively. Conclusion Time spent in LPA, MVPA and prevalence of meeting PA recommendations were greatly influenced by using different cut-points. This highlights the methodological issues related to choosing the appropriate analytic method for measurement of PA in frail older adults. Thus, more attention should be directed towards finding the most appropriate way of estimating PA in community-dwelling, frail older adults. External funding details The study is founded by Regional Research Funds Norway
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