Gustavo J Almeida1, James J Irrgang2, G Kelley Fitzgerald3, John M Jakicic4, Sara R Piva5. 1. G.J. Almeida, PT, PhD, Department of Physical Therapy, University of Pittsburgh, 100 Technology Dr, Ste 210, Pittsburgh, PA 15219 (USA). gja4@pitt.edu. 2. J.J. Irrgang, PT, PhD, ATC, FAPTA, Department of Orthopaedic Surgery, University of Pittsburgh. 3. G.K. Fitzgerald, PT, PhD, FAPTA, Department of Physical Therapy, University of Pittsburgh. 4. J.M. Jakicic, PhD, FACSM, FTOS, Department of Health and Physical Activity, University of Pittsburgh. 5. S.R. Piva, PT, PhD, OCS, FAAOMPT, Department of Physical Therapy, University of Pittsburgh.
Abstract
BACKGROUND: Few instruments that measure physical activity (PA) can accurately quantify PA performed at light and moderate intensities, which is particularly relevant in older adults. The evidence of their reliability in free-living conditions is limited. OBJECTIVE: The study objectives were: (1) to determine the test-retest reliability of the Actigraph (ACT), SenseWear Armband (SWA), and Community Healthy Activities Model Program for Seniors (CHAMPS) questionnaire in assessing free-living PA at light and moderate intensities in people after total knee arthroplasty; (2) to compare the reliability of the 3 instruments relative to each other; and (3) to determine the reliability of commonly used monitoring time frames (24 hours, waking hours, and 10 hours from awakening). DESIGN: A one-group, repeated-measures design was used. METHODS: Participants wore the activity monitors for 2 weeks, and the CHAMPS questionnaire was completed at the end of each week. Test-retest reliability was determined by using the intraclass correlation coefficient (ICC [2,k]) to compare PA measures from one week with those from the other week. RESULTS: Data from 28 participants who reported similar PA during the 2 weeks were included in the analysis. The mean age of these participants was 69 years (SD=8), and 75% of them were women. Reliability ranged from moderate to excellent for the ACT (ICC=.75-.86) and was excellent for the SWA (ICC=.93-.95) and the CHAMPS questionnaire (ICC=.86-.92). The 95% confidence intervals (95% CI) of the ICCs from the SWA were the only ones within the excellent reliability range (.85-.98). The CHAMPS questionnaire showed systematic bias, with less PA being reported in week 2. The reliability of PA measures in the waking-hour time frame was comparable to that in the 24-hour time frame and reflected most PA performed during this period. LIMITATIONS: Reliability may be lower for time intervals longer than 1 week. CONCLUSIONS: All PA measures showed good reliability. The reliability of the ACT was lower than those of the SWA and the CHAMPS questionnaire. The SWA provided more precise reliability estimates. Wearing PA monitors during waking hours provided sufficiently reliable measures and can reduce the burden on people wearing them.
BACKGROUND: Few instruments that measure physical activity (PA) can accurately quantify PA performed at light and moderate intensities, which is particularly relevant in older adults. The evidence of their reliability in free-living conditions is limited. OBJECTIVE: The study objectives were: (1) to determine the test-retest reliability of the Actigraph (ACT), SenseWear Armband (SWA), and Community Healthy Activities Model Program for Seniors (CHAMPS) questionnaire in assessing free-living PA at light and moderate intensities in people after total knee arthroplasty; (2) to compare the reliability of the 3 instruments relative to each other; and (3) to determine the reliability of commonly used monitoring time frames (24 hours, waking hours, and 10 hours from awakening). DESIGN: A one-group, repeated-measures design was used. METHODS:Participants wore the activity monitors for 2 weeks, and the CHAMPS questionnaire was completed at the end of each week. Test-retest reliability was determined by using the intraclass correlation coefficient (ICC [2,k]) to compare PA measures from one week with those from the other week. RESULTS: Data from 28 participants who reported similar PA during the 2 weeks were included in the analysis. The mean age of these participants was 69 years (SD=8), and 75% of them were women. Reliability ranged from moderate to excellent for the ACT (ICC=.75-.86) and was excellent for the SWA (ICC=.93-.95) and the CHAMPS questionnaire (ICC=.86-.92). The 95% confidence intervals (95% CI) of the ICCs from the SWA were the only ones within the excellent reliability range (.85-.98). The CHAMPS questionnaire showed systematic bias, with less PA being reported in week 2. The reliability of PA measures in the waking-hour time frame was comparable to that in the 24-hour time frame and reflected most PA performed during this period. LIMITATIONS: Reliability may be lower for time intervals longer than 1 week. CONCLUSIONS: All PA measures showed good reliability. The reliability of the ACT was lower than those of the SWA and the CHAMPS questionnaire. The SWA provided more precise reliability estimates. Wearing PA monitors during waking hours provided sufficiently reliable measures and can reduce the burden on people wearing them.
Authors: R G Marx; E C Jones; A A Allen; D W Altchek; S J O'Brien; S A Rodeo; R J Williams; R F Warren; T L Wickiewicz Journal: J Bone Joint Surg Am Date: 2001-10 Impact factor: 5.284
Authors: Richard P Troiano; David Berrigan; Kevin W Dodd; Louise C Mâsse; Timothy Tilert; Margaret McDowell Journal: Med Sci Sports Exerc Date: 2008-01 Impact factor: 5.411
Authors: Samannaaz S Khoja; Charity G Moore; Bret H Goodpaster; Anthony Delitto; Sara R Piva Journal: Arthritis Care Res (Hoboken) Date: 2018-02-06 Impact factor: 4.794
Authors: Meredith B Christiansen; Louise M Thoma; Hiral Master; Dana Voinier; Laura A Schmitt; Melissa L Ziegler; Michael P LaValley; Daniel K White Journal: Arthritis Care Res (Hoboken) Date: 2020-04-08 Impact factor: 4.794
Authors: Caroline Aubry; Corina Nüesch; Oliver Fiebig; Thomas M Stoll; Markus Köhler; Alain Barth; Annegret Mündermann Journal: N Am Spine Soc J Date: 2021-10-26
Authors: Gustavo J Almeida; Lauren Terhorst; James J Irrgang; G Kelley Fitzgerald; John M Jakicic; Sara R Piva Journal: J Exerc Sports Orthop Date: 2017-12-06