Evidence map›Paper›PMID 22127702›Full record

ArticleArthritis and rheumatism2011

Asymmetric loading and bone mineral density at the asymptomatic knees of patients with unilateral hip osteoarthritis.

Najia Shakoor, Anisha Dua, Laura E Thorp, Rachel A Mikolaitis, Markus A Wimmer, Kharma C Foucher, Louis F Fogg, Joel A Block

Abstract readComparative Study
In one paragraph

Article in Arthritis and rheumatism, 2011. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 26 papers.

0numbers the graph read from it
0cells of the map it votes in
26citing papers in PubMed
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

26 citing papers in PubMed.

  1. Trial
  2. Review
  3. Unilateral Single Joint Arthritis Changes Joint Power in Unaffected Joints.Journal of orthopaedic research : official publication of the Orthopaedic Research Society · 2025
    Article
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  16. Gait asymmetries in unilateral symptomatic hip osteoarthritis and their association with radiographic severity and pain.Hip international : the journal of clinical and experimental research on hip pathology and therapy · 2019
    Article
  17. Review
  18. Article
  19. Patients with chronic non-specific low back pain who reported reduction in pain and improvement in function also demonstrated an improvement in gait pattern.European spine journal : official publication of the European Spine Society, the European Spinal Deformity Society, and the European Section of the Cervical Spine Research Society · 2016
    Article
  20. Article
4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

8 authors.

Najia ShakoorSection of Rheumatology, Rush Medical College, Chicago, Illinois 60612-3862, USA. najia_shakoor@rush.edu
Anisha Dua
Laura E Thorp
Rachel A Mikolaitis
Markus A Wimmer
Kharma C Foucher
Louis F Fogg
Joel A Block

Funding

Factors influencing the evolution of knee osteoarthritisK23AR049748 · NIAMS · RUSH UNIVERSITY MEDICAL CENTER · PI SHAKOOR, NAJIA · 2004 to 2008
$540k
NIAMS NIH HHS K23 AR049748NIAMS NIH HHS K23-AR-049748NIA NIH HHS AG-024891NIA NIH HHS L30 AG024891
6 · The paper itself

Abstract

objectiveIn patients with unilateral end-stage hip osteoarthritis (OA), the contralateral knee is known to be at greater risk for end-stage knee OA compared to the ipsilateral (i.e., same-side) knee. The contralateral knee is known to have increased dynamic joint loads compared to the ipsilateral knee. The present study was undertaken to examine patients who had unilateral hip OA but who did not have symptoms of knee OA, in order to detect early asymmetries in knee loading.

methodsData on 62 patients with unilateral hip OA were evaluated. Patients underwent gait analyses of dynamic knee loads as well as dual x-ray absorptiometry for determination of bone mineral density (BMD) in both knees. Differences between knees were compared.

resultsPeak dynamic knee loads were significantly higher at the contralateral knee compared to the ipsilateral knee (mean ± SD 2.46 ± 0.71 percent of body weight × height versus 2.23 ± 0.81 percent of body weight × height; P = 0.029). Similarly, medial compartment tibial BMD was significantly higher in the contralateral knee compared to the ipsilateral knee (mean ± SD 0.897 ± 0.208 gm/cm(2) versus 0.854 ± 0.206 gm/cm(2); P = 0.033). Interestingly, there was a direct correlation between the contralateral:ipsilateral dynamic knee load and contralateral:ipsilateral medial compartment tibial BMD (ρ = 0.287, P = 0.036).

conclusionThe risk of developing progressive symptomatic OA in contralateral knees is higher compared to the risk in ipsilateral knees in patients with unilateral hip OA. The present study demonstrates that loading and structural asymmetries appear early in the disease course, while the knees are still asymptomatic. These early biomechanical asymmetries may have corresponding long-term consequences, providing further evidence for the potential role of loading in OA onset and progression.

Indexed as

Absorptiometry, PhotonAgedBiomechanical PhenomenaBone DensityDisease ProgressionFemaleGaitHumansKnee JointMaleMiddle AgedModels, BiologicalOsteoarthritis, HipOsteoarthritis, KneeRisk FactorsWeight-Bearing

Identifiers

PMID22127702
PMCPMC3234130

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Registered trials

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Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.