Is the Association between Knee Injury and Knee Osteoarthritis Modified by the Presence of General Joint Hypermobility.

Objective: To evaluate whether joint hypermobility modifies the association between knee joint injury and knee osteoarthritis (OA) among adults.

Methods: Data were from three studies: Genetics of Generalized Osteoarthritis (GOGO; N=2,341), Genetics of Osteoarthritis (GO; N=1,872), and the population-based Johnston County Osteoarthritis Project (JoCoOA; N=1,937). Knee injury was defined as a self-report of prior fracture or severe injury to either knee.

Racial Differences in Performance-Based Function and Potential Explanatory Factors Among Individuals With Knee Osteoarthritis.

Objective: In individuals with knee osteoarthritis (OA), self-reported physical function is poorer in African Americans than in whites, but whether this difference holds true for objective assessments is unclear. The purpose of this study was to examine racial differences in performance-based physical function as well as potential underlying factors contributing to these racial differences.

Methods: Participants with knee OA from a randomized controlled trial completed the 2-minute step test (2MST), timed-up-and-go (TUG), and 30-second chair stand (30s-CST) at baseline.

Association between general joint hypermobility and knee, hip, and lumbar spine osteoarthritis by race: a cross-sectional study.

Background: Osteoarthritis (OA) prevalence differs by race. General joint hypermobility (GJH) may be associated with OA, but differences by race are not known. This community-based study examined the frequency of GJH and its relationship with knee, hip, and lumbar spine OA by race (African American vs.

Agreement between pQCT- and DXA-derived indices of bone geometry, density, and theoretical strength in females of varying age, maturity, and physical activity.

Measurement of bone mass, geometry, density, and strength are critical in bone research and clinical studies. For peripheral quantitative computed tomography (pQCT), single and repeated measurements are particularly adversely affected by movement and positional variation. Dual-energy X-ray absorptiometry (DXA)-derived indices may alleviate these problems and provide useful alternative assessments.

Bone geometry, density, and strength indices of the distal radius reflect loading via childhood gymnastic activity.

The distal radius bears unique forces during gymnastic activity. Its relatively simple anatomy, minimal soft tissue envelope, and varied composition make the distal radius ideal for evaluating the effects of loading on bone properties. For 56 premenarcheal gymnasts and nongymnasts, ultradistal and 1/3 distal radius DXA scans measured bone mineral content (BMC), areal bone mineral density, and projected area.