4.4 Article

Secondary consequences of juvenile idiopathic arthritis in children and adolescents with knee involvement: physical activity, adiposity, fitness, and functional performance

Journal

RHEUMATOLOGY INTERNATIONAL
Volume 42, Issue 2, Pages 319-327

Publisher

SPRINGER HEIDELBERG
DOI: 10.1007/s00296-021-04920-5

Keywords

Physical activity; Adiposity; Cardiorespiratory fitness; Functional performance

Categories

Funding

  1. Vi Riddell Pediatric Rehabilitation Research Program
  2. Cumming School of Medicine
  3. Alberta Health Services
  4. Alberta Children's Hospital Foundation
  5. Alberta Innovates Technology Futures

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The study found that children and adolescents with JIA had lower levels of daily moderate-to-vigorous physical activity compared to their typically developing peers, highlighting the need for strategies to promote physical activity participation. Sex and age should be considered in research on the consequences of JIA.
Objective Secondary consequences of juvenile idiopathic arthritis (JIA) may impact long-term health outcomes. This study examined differences in physical activity, cardiorespiratory fitness, adiposity, and functional performance in children and adolescents with JIA compared to their typically developing (TD) peers. Methods Participants with JIA (n = 32; 10-20 years old) and their TD peers (n = 35) volunteered for assessments of: daily moderate-to-vigorous physical activity (MVPA, body-worn accelerometer); peak oxygen consumption (VO2 Peak, incremental bike test); fat mass index (FMI, dual-energy X-ray absorptiometry); and triple-single-leg-hop (TSLH) distance. Statistical analyses were performed in R using four linear mixed-effect models with Bonferroni adjustment (eta; = 0.0125). Fixed effects were group, sex, and age. Participant clusters based on sex and age (within 1.5 years) were considered as random effects. Results Participants with JIA displayed lower mean daily MVPA than their TD peers [p = 0.006; beta (98.75% CI); -21.2 (-40.4 to -2.9) min]. VO2 Peak [p = 0.019; -1.4 (-2.5 to -0.2) ml/kg/min] decreased with age. Females tended to have lower V-O2 Peak [p = 0.045; -6.4 (-13.0 to 0.4) ml/kg/min] and greater adiposity [p = 0.071; 1.4 (-0.1 to 3.0) kg/m(2)] than males. Conclusion The findings support the need for strategies to promote MVPA participation in children and adolescents with JIA. Sex and age should be considered in research on the consequences of JIA.

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