Clinical findings in patellofemoral osteoarthritis compared to individually-matched controls: a pilot study
Objective To explore clinical characteristics in individuals with patellofemoral osteoarthritis (PFOA) compared to individually-matched asymptomatic controls. We also explored associations between functional performance and patient-reported symptoms with patellofemoral alignment.Methods We assessed...
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doaj-e6aabde607ea4573a4cf6fe088001ac82021-07-29T14:01:42ZengBMJ Publishing GroupBMJ Open Sport & Exercise Medicine2055-76472020-04-016110.1136/bmjsem-2020-000877Clinical findings in patellofemoral osteoarthritis compared to individually-matched controls: a pilot studyBruce B Forster0Karim M Khan1Harvi F Hart2Agnes G d’Entremont3Charles R Ratzlaff4David R Wilson53 Department of Radiology, Faculty of Medicine, University of British Columbia, Vancouver, British Columbia, Canada 27 Department of Family Practice, The University of British Columbia, Vancouver, British Columbia, Canada La Trobe Sport and Exercise Medicine Research Centre, College of Science, Health and Engineering, La Trobe University, Melbourne, Victoria, Australia5 Department of Mechanical Engineering, The University of British Columbia, Vancouver, Canada7 Department of Physical Therapy, The University of British Columbia, Vancouver, Canada8 Department of Orthopaedics, The University of British Columbia, Vancouver, CanadaObjective To explore clinical characteristics in individuals with patellofemoral osteoarthritis (PFOA) compared to individually-matched asymptomatic controls. We also explored associations between functional performance and patient-reported symptoms with patellofemoral alignment.Methods We assessed 15 individuals with PFOA and 15 individually-matched asymptomatic controls. In addition to physical examination and patient-reported questionnaires, we evaluated functional performance, lower extremity strength and range of motion, and patellar alignment (using MRI). We analysed group differences with Wilcoxon’s matched-pairs signed rank tests, and within-group associations with Spearman’s rank correlations.Results We included 24 (80%) women with median (IQR) age of 56 (9) years and BMI of 22.8 (5.9) kg/m2. Individuals with PFOA reported lower quality of life (8/100 points lower EQ-5D-5L, p=0.02), and performed worse on two functional tests: repeated one-leg rises (median 16 fewer rises, p=0.04) and timed stair climb (1.2 s slower, p=0.03). There were no differences in strength tests performed or range of motion. Patellar proximal translation correlated with worse functional performance and worse patient-reported pain, function and self-efficacy, while lateral translation and lateral tilt correlated with worse knee-related quality of life (Spearman’s r ranging from 0.5 to 0.7).Conclusion Functional performance was worse in individuals with PFOA, despite those individuals having no significant differences on lower extremity strength testing. Patellofemoral alignment was associated with worse functional performance as well as worse patient-reported outcomes, and it may represent one mechanism underpinning PFOA-related symptoms.https://bmjopensem.bmj.com/content/6/1/e000877.full |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Bruce B Forster Karim M Khan Harvi F Hart Agnes G d’Entremont Charles R Ratzlaff David R Wilson |
spellingShingle |
Bruce B Forster Karim M Khan Harvi F Hart Agnes G d’Entremont Charles R Ratzlaff David R Wilson Clinical findings in patellofemoral osteoarthritis compared to individually-matched controls: a pilot study BMJ Open Sport & Exercise Medicine |
author_facet |
Bruce B Forster Karim M Khan Harvi F Hart Agnes G d’Entremont Charles R Ratzlaff David R Wilson |
author_sort |
Bruce B Forster |
title |
Clinical findings in patellofemoral osteoarthritis compared to individually-matched controls: a pilot study |
title_short |
Clinical findings in patellofemoral osteoarthritis compared to individually-matched controls: a pilot study |
title_full |
Clinical findings in patellofemoral osteoarthritis compared to individually-matched controls: a pilot study |
title_fullStr |
Clinical findings in patellofemoral osteoarthritis compared to individually-matched controls: a pilot study |
title_full_unstemmed |
Clinical findings in patellofemoral osteoarthritis compared to individually-matched controls: a pilot study |
title_sort |
clinical findings in patellofemoral osteoarthritis compared to individually-matched controls: a pilot study |
publisher |
BMJ Publishing Group |
series |
BMJ Open Sport & Exercise Medicine |
issn |
2055-7647 |
publishDate |
2020-04-01 |
description |
Objective To explore clinical characteristics in individuals with patellofemoral osteoarthritis (PFOA) compared to individually-matched asymptomatic controls. We also explored associations between functional performance and patient-reported symptoms with patellofemoral alignment.Methods We assessed 15 individuals with PFOA and 15 individually-matched asymptomatic controls. In addition to physical examination and patient-reported questionnaires, we evaluated functional performance, lower extremity strength and range of motion, and patellar alignment (using MRI). We analysed group differences with Wilcoxon’s matched-pairs signed rank tests, and within-group associations with Spearman’s rank correlations.Results We included 24 (80%) women with median (IQR) age of 56 (9) years and BMI of 22.8 (5.9) kg/m2. Individuals with PFOA reported lower quality of life (8/100 points lower EQ-5D-5L, p=0.02), and performed worse on two functional tests: repeated one-leg rises (median 16 fewer rises, p=0.04) and timed stair climb (1.2 s slower, p=0.03). There were no differences in strength tests performed or range of motion. Patellar proximal translation correlated with worse functional performance and worse patient-reported pain, function and self-efficacy, while lateral translation and lateral tilt correlated with worse knee-related quality of life (Spearman’s r ranging from 0.5 to 0.7).Conclusion Functional performance was worse in individuals with PFOA, despite those individuals having no significant differences on lower extremity strength testing. Patellofemoral alignment was associated with worse functional performance as well as worse patient-reported outcomes, and it may represent one mechanism underpinning PFOA-related symptoms. |
url |
https://bmjopensem.bmj.com/content/6/1/e000877.full |
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