{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,9,25]],"date-time":"2026-09-25T10:53:08Z","timestamp":1790333588025,"version":"4.1.0"},"reference-count":95,"publisher":"Journal of Orthopaedic & Sports Physical Therapy (JOSPT)","issue":"5","content-domain":{"domain":["www.jospt.org"],"crossmark-restriction":true},"short-container-title":["Journal of Orthopaedic &amp; Sports Physical Therapy"],"published-print":{"date-parts":[[2021,5]]},"abstract":"<jats:sec><jats:title>Objective<\/jats:title><jats:p> To estimate the pooled prevalence of, and factors associated with, the presence of patellar tendon abnormalities observed on imaging in people without symptoms. <\/jats:p><\/jats:sec><jats:sec><jats:title>Design<\/jats:title><jats:p> Systematic review with stratified meta-analysis and meta-regression. <\/jats:p><\/jats:sec><jats:sec><jats:title>Literature Search<\/jats:title><jats:p> We searched Embase, Scopus, MEDLINE, CINAHL, SPORTDiscus, and Web of Science from 1980 to August 2020. <\/jats:p><\/jats:sec><jats:sec><jats:title>Study Selection Criteria<\/jats:title><jats:p> We included studies that reported the prevalence of asymptomatic patellar tendon abnormalities on imaging. We excluded studies of participants with current tendon pain, a history of tendon pain, or other systemic conditions. <\/jats:p><\/jats:sec><jats:sec><jats:title>Data Synthesis<\/jats:title><jats:p> Stratification and meta-regression of studies based on study-level descriptive statistics (mean age, body mass index, proportion of female participants, physical activity participation, imaging modality) were performed using a random-effects model to account for between-study heterogeneity. Risk of bias was assessed using the modified Newcastle-Ottawa scale. <\/jats:p><\/jats:sec><jats:sec><jats:title>Results<\/jats:title><jats:p> Meta-analysis of 64 studies (7125 limbs from 4616 participants) found significant between-study heterogeneity (I<jats:sup>2<\/jats:sup>\u226590%, P&lt;.01), which precluded a summary prevalence estimate. Heterogeneity was partially explained by studies that included participants who were physically active and studies that assessed tendon abnormalities using magnetic resonance imaging compared to ultrasound (P&lt;.05). Mean age, body mass index, proportion of female participants, and sample size did not explain the remaining heterogeneity. <\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusion<\/jats:title><jats:p> There was substantial variability in the reported prevalence of asymptomatic patellar tendon abnormalities. A clear and valid method is needed to assess and report the presence of patellar tendon abnormalities to increase research capacity and establish the clinical value of imaging the patellar tendon. J Orthop Sports Phys Ther 2021;51(5):216\u2013231. 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