{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,5,20]],"date-time":"2026-05-20T15:49:30Z","timestamp":1779292170292,"version":"3.51.4"},"reference-count":50,"publisher":"The Journal of Rheumatology","issue":"8","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["J Rheumatol"],"published-print":{"date-parts":[[2017,8]]},"abstract":"<jats:sec><jats:title>Objective.<\/jats:title><jats:p>(1) To determine convergent validity of an activity diary (AD) and accelerometer (Actical brand\/Phillips-Respironics) in measuring physical activity (PA) in children with juvenile idiopathic arthritis (JIA). (2) To determine how many days give reliable results. (3) To analyze effects of correcting accelerometer data for non-wear.<\/jats:p><\/jats:sec><jats:sec><jats:title>Methods.<\/jats:title><jats:p>Patients with JIA (8\u201313 yrs) were recruited from 3 Dutch pediatric rheumatology centers. PA was assessed for 7 days with an AD and accelerometer, and was expressed as mean min\/day of rest, light PA (LPA), moderate to vigorous PA (MVPA), and PA level (PAL). To analyze convergent validity, intraclass correlation coefficients (ICC) were calculated and paired sample Student t tests were performed. The required number of days to achieve reliable results was calculated using the Spearman-Brown prophecy formula.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results.<\/jats:title><jats:p>Convergent validity between AD and accelerometer was moderate for rest and PAL (ICC 0.41). ICC for LPA and MVPA were &lt; 0.24. AD overestimated PAL and MVPA compared with the accelerometer. Wearing the accelerometer 7\u201319 days gave reliable PA estimates on group and individual levels. For the AD, 13\u201336 days were needed. Adjusting accelerometer data for non-wear resulted in a clinically relevant higher mean number of min\/day spent in LPA (effect size 1.12), but not in MVPA (effect size 0.44).<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion.<\/jats:title><jats:p>Convergent validity between AD and accelerometer is moderate to poor. In children with JIA, 1-week assessment with an accelerometer is sufficient to measure PA (all levels) reliably. On an individual level and for clinical use, 3 weeks are required. Additional use of AD enables correction for non-wear of accelerometer data.<\/jats:p><\/jats:sec>","DOI":"10.3899\/jrheum.160671","type":"journal-article","created":{"date-parts":[[2017,4,2]],"date-time":"2017-04-02T00:20:15Z","timestamp":1491092415000},"page":"1249-1256","source":"Crossref","is-referenced-by-count":14,"title":["Measuring Physical Activity in Juvenile Idiopathic Arthritis: Activity Diary Versus Accelerometer"],"prefix":"10.3899","volume":"44","author":[{"given":"Wineke","family":"Armbrust","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"G.J.F. Joyce","family":"Bos","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Jan H.B.","family":"Geertzen","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Pieter J.J.","family":"Sauer","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Pieter U.","family":"Dijkstra","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Otto T.H.M.","family":"Lelieveld","sequence":"additional","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"2262","published-online":{"date-parts":[[2017,4,1]]},"reference":[{"key":"2018112909371561000_44.8.1249.1","first-page":"423","article-title":"Physical activity epidemiology: concepts, methods, and applications to exercise science","volume":"17","author":"Caspersen","year":"1989","journal-title":"Exerc Sport Sci Rev"},{"key":"2018112909371561000_44.8.1249.2","unstructured":"US Centers for Disease Control and Prevention . Physical activity and health: a report of the surgeon general executive summary. [Internet. Accessed March 3, 2017.] Available from: www.cdc.gov\/nccdphp\/sgr\/"},{"key":"2018112909371561000_44.8.1249.3","doi-asserted-by":"publisher","DOI":"10.1503\/cmaj.051351"},{"key":"2018112909371561000_44.8.1249.4","doi-asserted-by":"crossref","first-page":"533","DOI":"10.2165\/00007256-200737060-00006","article-title":"The contribution of physical activity and sedentary behaviours to the growth and development of children and adolescents: implications for overweight and obesity","volume":"3","author":"Hills","year":"2007","journal-title":"Sports Med"},{"key":"2018112909371561000_44.8.1249.5","doi-asserted-by":"publisher","DOI":"10.1016\/j.jpeds.2005.01.055"},{"key":"2018112909371561000_44.8.1249.6","doi-asserted-by":"publisher","DOI":"10.1002\/art.11055"},{"key":"2018112909371561000_44.8.1249.7","doi-asserted-by":"publisher","DOI":"10.1186\/1546-0096-11-46"},{"key":"2018112909371561000_44.8.1249.8","first-page":"287","article-title":"Exercise therapy in juvenile idiopathic arthritis: a Cochrane Review","volume":"44","author":"Takken","year":"2008","journal-title":"Eur J Phys Rehabil Med"},{"key":"2018112909371561000_44.8.1249.9","doi-asserted-by":"publisher","DOI":"10.1002\/art.1790080210"},{"key":"2018112909371561000_44.8.1249.10","doi-asserted-by":"publisher","DOI":"10.1002\/art.24102"},{"key":"2018112909371561000_44.8.1249.11","doi-asserted-by":"publisher","DOI":"10.1007\/s00431-010-1199-2"},{"key":"2018112909371561000_44.8.1249.12","doi-asserted-by":"publisher","DOI":"10.1007\/s10067-011-1832-0"},{"key":"2018112909371561000_44.8.1249.13","doi-asserted-by":"crossref","first-page":"425","DOI":"10.1111\/jpc.12733","article-title":"Fundamental movement skills, physical fitness and physical activity among Australian children with juvenile idiopathic arthritis","volume":"51","author":"Hulsegge","year":"2015","journal-title":"J Paediatr Child Health"},{"key":"2018112909371561000_44.8.1249.14","doi-asserted-by":"crossref","first-page":"57","DOI":"10.1186\/s12969-015-0053-5","article-title":"Reduced physical activity in children and adolescents with juvenile idiopathic arthritis despite satisfactory control of inflammation","volume":"13","author":"Bohr","year":"2015","journal-title":"Pediatr Rheumatol Online J"},{"key":"2018112909371561000_44.8.1249.15","doi-asserted-by":"crossref","first-page":"179","DOI":"10.3109\/03009742.2015.1057862","article-title":"Accelerometry-based monitoring of daily physical activity in children with juvenile idiopathic arthritis","volume":"45","author":"N\u00f8rgaard","year":"2016","journal-title":"Scand J Rheumatol"},{"key":"2018112909371561000_44.8.1249.16","doi-asserted-by":"crossref","first-page":"587","DOI":"10.1016\/j.semarthrit.2015.10.008","article-title":"Fatigue in patients with juvenile idiopathic arthritis: a systematic review of the literature","volume":"45","author":"Armbrust","year":"2016","journal-title":"Semin Arthritis Rheum"},{"key":"2018112909371561000_44.8.1249.17","first-page":"126","article-title":"Physical activity, exercise, and physical fitness: definitions and distinctions for health-related research","volume":"100","author":"Caspersen","year":"1985","journal-title":"Public Health Rep"},{"key":"2018112909371561000_44.8.1249.18","doi-asserted-by":"publisher","DOI":"10.1177\/1559827607301686"},{"key":"2018112909371561000_44.8.1249.19","doi-asserted-by":"publisher","DOI":"10.1136\/bjsm.2008.052449"},{"key":"2018112909371561000_44.8.1249.20","doi-asserted-by":"publisher","DOI":"10.2165\/00007256-200131060-00004"},{"key":"2018112909371561000_44.8.1249.21","doi-asserted-by":"publisher","DOI":"10.1136\/ard.62.9.885"},{"key":"2018112909371561000_44.8.1249.22","doi-asserted-by":"crossref","first-page":"697","DOI":"10.1002\/acr.20085","article-title":"Promoting physical activity in children with juvenile idiopathic arthritis through an internet-based program: results of a pilot randomized controlled trial","volume":"62","author":"Lelieveld","year":"2010","journal-title":"Arthritis Care Res"},{"key":"2018112909371561000_44.8.1249.23","first-page":"1626","article-title":"Aerobic fitness and physical activity in patients with HLA-B27 positive juvenile spondyloarthropathy that is inactive or in remission","volume":"25","author":"Hebestreit","year":"1998","journal-title":"J Rheumatol"},{"issue":"7 Suppl","key":"2018112909371561000_44.8.1249.24","doi-asserted-by":"crossref","first-page":"S544","DOI":"10.1249\/MSS.0b013e31817c6651","article-title":"How many days was that? We\u2019re still not sure, but we\u2019re asking the question better!","volume":"40","author":"Baranowski","year":"2008","journal-title":"Med Sci Sports Exerc"},{"key":"2018112909371561000_44.8.1249.25","doi-asserted-by":"publisher","DOI":"10.1136\/bjsports-2011-090190"},{"key":"2018112909371561000_44.8.1249.26","doi-asserted-by":"publisher","DOI":"10.1001\/archpedi.157.2.185"},{"key":"2018112909371561000_44.8.1249.27","doi-asserted-by":"publisher","DOI":"10.1249\/01.mss.0000185657.86065.98"},{"key":"2018112909371561000_44.8.1249.28","doi-asserted-by":"crossref","first-page":"2124","DOI":"10.1017\/S1368980011001868","article-title":"Measuring physical activity using accelerometry in 13-15-year-old adolescents: the importance of including non-wear activities","volume":"14","author":"De Meester","year":"2011","journal-title":"Public Health Nutr"},{"key":"2018112909371561000_44.8.1249.29","doi-asserted-by":"crossref","first-page":"31","DOI":"10.1186\/s12969-015-0029-5","article-title":"Design and acceptance of Rheumates@Work, a combined internet-based and in person instruction model, an interactive, educational, and cognitive behavioral program for children with juvenile idiopathic arthritis","volume":"13","author":"Armbrust","year":"2015","journal-title":"Pediatr Rheumatol Online J"},{"key":"2018112909371561000_44.8.1249.30","first-page":"390","article-title":"International League of Associations for Rheumatology classification of juvenile idiopathic arthritis: second revision, Edmonton, 2001","volume":"31","author":"Petty","year":"2004","journal-title":"J Rheumatol"},{"key":"2018112909371561000_44.8.1249.31","first-page":"1625","article-title":"Prediction of activity energy expenditure using accelerometers in children","volume":"36","author":"Puyau","year":"2004","journal-title":"Med Sci Sport Exerc"},{"key":"2018112909371561000_44.8.1249.32","doi-asserted-by":"crossref","first-page":"461","DOI":"10.1093\/ajcn\/37.3.461","article-title":"A method to assess energy expenditure in children and adults","volume":"37","author":"Bouchard","year":"1983","journal-title":"Am J Clin Nutr"},{"key":"2018112909371561000_44.8.1249.33","doi-asserted-by":"publisher","DOI":"10.1038\/sj.ejcn.1600449"},{"key":"2018112909371561000_44.8.1249.34","doi-asserted-by":"publisher","DOI":"10.1097\/JES.0b013e3181877d1a"},{"key":"2018112909371561000_44.8.1249.35","doi-asserted-by":"publisher","DOI":"10.1080\/02701367.2006.10599333"},{"key":"2018112909371561000_44.8.1249.36","doi-asserted-by":"publisher","DOI":"10.1016\/j.jclinepi.2005.11.020"},{"key":"2018112909371561000_44.8.1249.37","doi-asserted-by":"crossref","first-page":"307","DOI":"10.1016\/S0140-6736(86)90837-8","article-title":"Statistical methods for assessing agreement between two methods of clinical measurement","volume":"8","author":"Bland","year":"1986","journal-title":"Lancet"},{"key":"2018112909371561000_44.8.1249.38","doi-asserted-by":"crossref","first-page":"141","DOI":"10.11613\/BM.2015.015","article-title":"Lessons in biostatistics","volume":"25","author":"Giavarina","year":"2015","journal-title":"Biochem Medica"},{"key":"2018112909371561000_44.8.1249.39","first-page":"107","article-title":"Reliability of work-related assessments","volume":"13","author":"Innes","year":"1999","journal-title":"Work"},{"key":"2018112909371561000_44.8.1249.40","doi-asserted-by":"publisher","DOI":"10.1080\/02640414.2011.593185"},{"key":"2018112909371561000_44.8.1249.41","doi-asserted-by":"crossref","first-page":"124","DOI":"10.1123\/pes.25.1.124","article-title":"Parents\u2019 perceptions of children\u2019s physical activity compared on two electronic diaries","volume":"25","author":"Lau","year":"2013","journal-title":"Pediatr Exerc Sci"},{"key":"2018112909371561000_44.8.1249.42","doi-asserted-by":"crossref","first-page":"261","DOI":"10.1017\/S1368980009990681","article-title":"Validity of the Bouchard activity diary in Spanish adolescents","volume":"13","author":"Mart\u00ednez-G\u00f3mez","year":"2010","journal-title":"Public Health Nutr"},{"key":"2018112909371561000_44.8.1249.43","doi-asserted-by":"publisher","DOI":"10.1123\/pes.19.3.252"},{"key":"2018112909371561000_44.8.1249.44","doi-asserted-by":"crossref","first-page":"117","DOI":"10.1123\/pes.2014-0185","article-title":"Validation of accelerometer prediction equations in children with chronic disease","volume":"28","author":"Stephens","year":"2016","journal-title":"Pediatr Exerc Sci"},{"key":"2018112909371561000_44.8.1249.45","doi-asserted-by":"publisher","DOI":"10.1038\/ejcn.2010.196"},{"key":"2018112909371561000_44.8.1249.46","doi-asserted-by":"publisher","DOI":"10.1097\/00005768-200002000-00025"},{"key":"2018112909371561000_44.8.1249.47","doi-asserted-by":"crossref","first-page":"103","DOI":"10.1123\/pes.2013-0021","article-title":"Assessing preschool children\u2019s physical activity: how many days of accelerometry measurement","volume":"26","author":"Addy","year":"2014","journal-title":"Pediatr Exerc Sci"},{"key":"2018112909371561000_44.8.1249.48","doi-asserted-by":"publisher","DOI":"10.2165\/00007256-200737120-00004"},{"key":"2018112909371561000_44.8.1249.49","doi-asserted-by":"crossref","first-page":"2047","DOI":"10.1080\/02640414.2016.1150599","article-title":"Adolescent physical activity levels: discrepancies with accelerometer data analysis","volume":"34","author":"Logan","year":"2016","journal-title":"J Sports Sci"},{"key":"2018112909371561000_44.8.1249.50","doi-asserted-by":"crossref","first-page":"110","DOI":"10.1080\/02701367.2015.1129046","article-title":"The influence of epoch length on physical activity patterns varies by child\u2019s activity level","volume":"87","author":"Nettlefold","year":"2016","journal-title":"Res Q Exerc Sport"}],"container-title":["The Journal of Rheumatology"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/syndication.highwire.org\/content\/doi\/10.3899\/jrheum.160671","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2022,7,27]],"date-time":"2022-07-27T04:03:31Z","timestamp":1658894611000},"score":1,"resource":{"primary":{"URL":"http:\/\/www.jrheum.org\/lookup\/doi\/10.3899\/jrheum.160671"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2017,4,1]]},"references-count":50,"journal-issue":{"issue":"8","published-online":{"date-parts":[[2017,8,1]]},"published-print":{"date-parts":[[2017,8]]}},"alternative-id":["10.3899\/jrheum.160671"],"URL":"https:\/\/doi.org\/10.3899\/jrheum.160671","relation":{},"ISSN":["0315-162X","1499-2752"],"issn-type":[{"value":"0315-162X","type":"print"},{"value":"1499-2752","type":"electronic"}],"subject":[],"published":{"date-parts":[[2017,4,1]]}}}