{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2026,3,15]],"date-time":"2026-03-15T21:19:29Z","timestamp":1773609569234,"version":"3.50.1"},"reference-count":48,"publisher":"National Athletic Trainers' Association","issue":"3","content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":[],"published-print":{"date-parts":[[2014,6,1]]},"abstract":"<jats:sec><jats:title>Context:<\/jats:title><jats:p>Prospective measures of high external knee-abduction moment (KAM) during landing identify female athletes at increased risk of patellofemoral pain (PFP). A clinically applicable screening protocol is needed.<\/jats:p><\/jats:sec><jats:sec><jats:title>Objective:<\/jats:title><jats:p>To identify biomechanical laboratory measures that would accurately quantify KAM loads during landing that predict increased risk of PFP in female athletes and clinical correlates to laboratory-based measures of increased KAM status for use in a clinical PFP injury-risk prediction algorithm. We hypothesized that we could identify clinical correlates that combine to accurately determine increased KAM associated with an increased risk of developing PFP.<\/jats:p><\/jats:sec><jats:sec><jats:title>Design:<\/jats:title><jats:p>Descriptive laboratory study.<\/jats:p><\/jats:sec><jats:sec><jats:title>Setting:<\/jats:title><jats:p>Biomechanical laboratory.<\/jats:p><\/jats:sec><jats:sec><jats:title>Patients or Other Participants:<\/jats:title><jats:p>Adolescent female basketball and soccer players (n = 698) from a single-county public school district.<\/jats:p><\/jats:sec><jats:sec><jats:title>Main Outcome Measure(s):<\/jats:title><jats:p>We conducted tests of anthropometrics, maturation, laxity, flexibility, strength, and landing biomechanics before each competitive season. Pearson correlation and linear and logistic regression modeling were used to examine high KAM (&amp;gt;15.4 Nm) compared with normal KAM as a surrogate for PFP injury risk.<\/jats:p><\/jats:sec><jats:sec><jats:title>Results:<\/jats:title><jats:p>The multivariable logistic regression model that used the variables peak knee-abduction angle, center-of-mass height, and hip rotational moment excursion predicted KAM associated with PFP risk (&amp;gt;15.4 NM of KAM) with 92% sensitivity and 74% specificity and a C statistic of 0.93. The multivariate linear regression model that included the same predictors accounted for 70% of the variance in KAM. We identified clinical correlates to laboratory measures that combined to predict high KAM with 92% sensitivity and 47% specificity. The clinical prediction algorithm, including knee-valgus motion (odds ratio [OR] = 1.46, 95% confidence interval [CI] = 1.31, 1.63), center-of-mass height (OR = 1.21, 95% CI = 1.15, 1.26), and hamstrings strength\/body fat percentage (OR = 1.80, 95% CI = 1.02, 3.16) predicted high KAM with a C statistic of 0.80.<\/jats:p><\/jats:sec><jats:sec><jats:title>Conclusions:<\/jats:title><jats:p>Clinical correlates to laboratory-measured biomechanics associated with an increased risk of PFP yielded a highly sensitive model to predict increased KAM status. This screening algorithm consisting of a standard camcorder, physician scale for mass, and handheld dynamometer may be used to identify athletes at increased risk of PFP.<\/jats:p><\/jats:sec>","DOI":"10.4085\/1062-6050-49.2.17","type":"journal-article","created":{"date-parts":[[2014,4,24]],"date-time":"2014-04-24T21:33:03Z","timestamp":1398375183000},"page":"389-398","source":"Crossref","is-referenced-by-count":17,"title":["A Predictive Model to Estimate Knee-Abduction Moment: Implications for Development of a Clinically Applicable Patellofemoral Pain Screening Tool in Female Athletes"],"prefix":"10.4085","volume":"49","author":[{"given":"Gregory D.","family":"Myer","sequence":"first","affiliation":[{"name":"Sports Medicine Biodynamics Center and Human Performance Laboratory, Cincinnati Children's Hospital Medical Center, OH"},{"name":"Department of Pediatrics, College of Medicine, University of Cincinnati, OH"},{"name":"Department of Orthopaedic Surgery, College of Medicine, University of Cincinnati, OH"},{"name":"The Micheli Center for Sports Injury Prevention, Waltham, MA"},{"name":"Sports Health and Performance Institute, The Ohio State University Medical Center, Columbus"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kevin R.","family":"Ford","sequence":"first","affiliation":[{"name":"Sports Medicine Biodynamics Center and Human Performance Laboratory, Cincinnati Children's Hospital Medical Center, OH"},{"name":"Department of Pediatrics, College of Medicine, University of Cincinnati, OH"},{"name":"Department of Physical Therapy, School of Health Sciences, High Point University, NC"}],"role":[{"role":"author","vocabulary":"crossref"}]},{"given":"Kim D. 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