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  • Prognostic factors for patellofemoral pain: a multicentre observational analysis

    Author(s)
    Bierma-Zeinstra, Sita A.
    Crossley, Kay
    van Linschoten, Robbart
    Vicenzino, Bill
    van Middelkoop, Marienke
    Griffith University Author(s)
    Collins, Natalie
    Year published
    2013
    Metadata
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    Abstract
    Objectives Describe proportions of individuals with patellofemoral pain (PFP) with an unfavourable recovery over 12 months; identify clinical predictors of poor recovery at 3 and 12 months; and determine baseline values of predictors that identify those with poor 12-month prognosis. Methods An observational analysis utilised data from 310 individuals with PFP enrolled in two randomised clinical trials. Thirteen baseline variables ( participant, PFP, study characteristics) were investigated for their prognostic ability. Pain, function and global recovery were measured at 3 and 12 months. Multivariate backward stepwise regression ...
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    Objectives Describe proportions of individuals with patellofemoral pain (PFP) with an unfavourable recovery over 12 months; identify clinical predictors of poor recovery at 3 and 12 months; and determine baseline values of predictors that identify those with poor 12-month prognosis. Methods An observational analysis utilised data from 310 individuals with PFP enrolled in two randomised clinical trials. Thirteen baseline variables ( participant, PFP, study characteristics) were investigated for their prognostic ability. Pain, function and global recovery were measured at 3 and 12 months. Multivariate backward stepwise regression analyses (treatmentadjusted, p<0.10) were performed for each follow-up measure. Receiver operator characteristic curves identified cut-points associated with unfavourable recovery at 12 months. Results 55% and 40% of participants had an unfavourable recovery at 3 and 12 months, respectively. Longer baseline pain duration was significantly associated with poor 3-month and 12-month recovery on measures of pain severity (ߠ11.36 to 24.94), Anterior Knee Pain (AKP) Scale (-4.44 to -11.33) and global recovery (OR: 2.32 to 6.11). Greater baseline pain severity and lower AKP Scale score were significantly associated with poor recovery on multiple measures ( p<0.05). Baseline duration >2 months and AKP Scale score <70/100 were associated with unfavourable 12-month recovery. Conclusions A substantial number of individuals with PFP have an unfavourable recovery over 12 months, irrespective of intervention. Knee pain duration >2 months is the most consistent prognostic indicator, followed by AKP Scale score <70. Sports medicine practitioners should utilise interventions with known efficacy in reducing PFP, and promote early intervention to maximise prognosis.
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    Journal Title
    British Journal of Sports Medicine
    Volume
    47
    Issue
    4
    DOI
    https://doi.org/10.1136/bjsports-2012-091696
    Subject
    Physiotherapy
    Engineering
    Medical and Health Sciences
    Education
    Publication URI
    http://hdl.handle.net/10072/55969
    Collection
    • Journal articles

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