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Between-Day Reliability of Pre-Participation Screening Components in Pre-Professional Ballet and Contemporary Dancers

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Critical appraisal of research investigating risk factors for musculoskeletal injury in dancers suggests high quality reliability studies are lacking. The purpose of this study was to determine between-day reliability of pre-participation screening (PPS) components in pre-professional ballet and contemporary dancers. Thirty-eight dancers (35 female, 3 male; median age; 18 years; range: 11 to 30 years) participated. Screening components (Athletic Coping Skills Inventory-28, body mass index, percent total body fat, total bone mineral density, Foot Posture Index-6, hip and ankle range of motion, three lumbopelvic control tasks, unipedal dynamic balance, and the Y-Balance Test) were conducted one week apart. Intra-class correlation coefficients (ICCs: 95% confidence intervals), standard error of measurement, minimal detectable change (MDC), Bland-Altman methods of agreement [95% limits of agreement (LOA)], Cohen's kappa coefficients, standard error, and percent agreements were calculated. Depending on the screening component, ICC estimates ranged from 0.51 to 0.98, kappa coefficients varied between -0.09 and 0.47, and percent agreement spanned 71% to 95%. Wide 95% LOA were demonstrated by Foot Posture Index-6 (right: -6.06, 7.31), passive hip external rotation (right: -9.89, 16.54), and passive supine turnout (left: -15.36, 17.58). The PPS components examined demonstrated moderate to excellent relative reliability with mean between-day differences less than MDC, or sufficient percent agreement, across all assessments. However, due to wide 95% limits of agreement, the Foot Posture Index-6 and passive hip range of motion are not recommended for screening injury risk in pre-professional dancers.
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Document Type: Research Article

Affiliations: 1: Sport Injury Prevention Research Centre, Faculty of Kinesiology, University of Calgary, Calgary, Alberta, Canada, 2500 University Drive NW, Calgary, Alberta, Canada, T2N 1N4;, Email: [email protected] 2: Sport Injury Prevention Research Centre, Faculty of Kinesiology and Department of Community Health Sciences, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada 3: Sport Injury Prevention Research Centre, Faculty of Kinesiology, University of Calgary, Calgary, Alberta, Canada 4: Department of Physical Therapy, Faculty of Rehabilitation Medicine, and Glen Sather Sports Medicine Clinic, University of Alberta, Edmonton, Alberta, Canada 5: Sport Injury Prevention Research Centre, Faculty of Kinesiology; Department of Community Health Sciences; and Alberta Children's Hospital Research Institute for Child and Maternal Health, Department of Pediatrics, Cumming School of Medicine, University of Calgary, Calgary, Alberta, Canada

Publication date: March 1, 2018

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