Number of days required to measure sedentary time and physical activity using accelerometery in rheumatoid arthritis: a reliability study.
Author
O'Brien CMKitas GD
Rayner F
Isaacs JD
Baker KF
Pratt AG
Buckley CD
Raza K
Filer A
Siebert S
McInnes I
McGucken A
Fenton SAM
Affiliation
University of Surrey; The Dudley Group NHS Foundation Trust; University of Birmingham; Newcastle University; Newcastle Upon Tyne Hospitals NHS Foundation Trust; University of Oxford; Sandwell and West Birmingham NHS Trust; University of Glasgow.Publication date
01/08/2023
Metadata
Show full item recordAbstract
This study aimed to determine the minimum number of days required to reliably estimate free-living sedentary time, light-intensity physical activity (LPA) and moderate-intensity physical activity (MPA) using accelerometer data in people with Rheumatoid Arthritis (RA), according to Disease Activity Score-28-C-reactive protein (DAS-28-CRP). Secondary analysis of two existing RA cohorts with controlled (cohort 1) and active (cohort 2) disease was undertaken. People with RA were classified as being in remission (DAS-28-CRP < 2.4, n = 9), or with low (DAS-28-CRP ? 2.4-? 3.2, n = 15), moderate (DAS-28-CRP > 3.2-? 5.1, n = 41) or high (DAS-28-CRP > 5.1, n = 16) disease activity. Participants wore an ActiGraph accelerometer on their right hip for 7 days during waking hours. Validated RA-specific cut-points were applied to accelerometer data to estimate free-living sedentary time, LPA and MPA (%/day). Single-day intraclass correlation coefficients (ICC) were calculated and used in the Spearman Brown prophecy formula to determine the number of monitoring days required to achieve measurement reliability (ICC ? 0.80) for each group. The remission group required ? 4 monitoring days to achieve an ICC ? 0.80 for sedentary time and LPA, with low, moderate and high disease activity groups requiring ? 3 monitoring days to reliably estimate these behaviours. The monitoring days required for MPA were more variable across disease activity groups (remission = ? 3 days, low = ? 2 days, moderate = ? 3 days, high = ? 5 days). We conclude at least 4 monitoring days will reliably estimate sedentary time and LPA in RA, across the whole spectrum of disease activity. However, to reliably estimate behaviours across the movement continuum (sedentary time, LPA, MPA), at least 5 monitoring days are required. 2023. Crown.Citation
O'Brien CM, Kitas GD, Rayner F, Isaacs JD, Baker KF, Pratt AG, Buckley CD, Raza K, Filer A, Siebert S, McInnes I, McGucken A, Fenton SAM; BIOFLARE Consortium. Number of days required to measure sedentary time and physical activity using accelerometery in rheumatoid arthritis: a reliability study. Rheumatol Int. 2023 Aug;43(8):1459-1465. doi: 10.1007/s00296-023-05342-1. Epub 2023 May 25. PMID: 37227468; PMCID: PMC10261182.Type
ArticlePMID
37227468Journal
Rheumatology InternationalPublisher
Springerae974a485f413a2113503eed53cd6c53
10.1007/s00296-023-05342-1