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Clustering of hand osteoarthritis progression and its relationship to progression of osteoarthritis at the knee
  1. Jessica Bijsterbosch1,
  2. Ingrid Meulenbelt2,
  3. Iain Watt3,
  4. Frits R Rosendaal4,
  5. Tom W J Huizinga1,
  6. Margreet Kloppenburg1
  1. 1Department of Rheumatology, Leiden University Medical Center, Leiden, The Netherlands
  2. 2Department of Molecular Epidemiology, Leiden University Medical Center, Leiden, The Netherlands
  3. 3Department of Radiology, Leiden University Medical Center, Leiden, The Netherlands
  4. 4Department of Clinical Epidemiology, Leiden University Medical Center, Leiden, The Netherlands
  1. Correspondence to Dr Jessica Bijsterbosch, Department of Rheumatology, C1-R, Leiden University Medical Center, PO Box 9600, Leiden 2300 RC, The Netherlands; J.Bijsterbosch{at}lumc.nl

Abstract

Objective To investigate patterns of osteoarthritis (OA) progression within hand joints and the relationship between hand OA progression and progression of OA at the knee.

Methods Radiographic progression over 6 years, defined as change in osteophytes or joint space narrowing above the smallest detectable change, was assessed on hand and knee radiographs of 236 hand OA patients participating in the Genetics, Arthrosis and Progression (GARP) sibling pair cohort study using OARSI atlas. Clustering of radiographic progression between hand joint groups (DIP, PIP, IP-1 and CMC-1) was assessed using χ2 test. Symmetry, clustering by row and ray and familial aggregation in sibling pairs were also evaluated. The association between hand OA progression and progression of OA at the knee was assessed using generalised estimating equation analysis.

Results There was clustering of OA progression between hand joint groups, the strongest relationship among DIP, PIP and IP-1 joints. Other patterns were symmetry (OR 4.7 (95% CI 3.3 to 6.5)) and clustering by row (OR 2.9 (95% CI 1.9 to 4.6)) but not by ray (OR 1.3 (95% CI 0.7 to 2.4)). There was familial aggregation of hand OA progression. Patients with progression of hand OA had a higher risk for radiographic change at the knee than those without hand OA progression (OR 2.3 (95% CI 1.3 to 4.0)).

Conclusions Progression of hand OA clusters between hand joint groups, especially between IP joints, and within sibling pairs. It is associated with OA change at the knee. These findings contribute to defining hand OA subsets and suggest a role for systemic factors.

  • Hand Osteoarthritis
  • Knee Osteoarthritis
  • Epidemiology

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