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Coding sports injury surveillance data: has version 10 of the Orchard Sports Injury Classification System improved the classification of sports medicine diagnoses?
  1. L E Hammond1,
  2. J Lilley1,
  3. W J Ribbans2
  1. 1
    Division of Rehabilitation and Ageing, University of Nottingham, Nottingham, UK
  2. 2
    School of Health, University of Northampton, Northampton, UK
  1. Lucy Hammond, University of Nottingham, Division of Rehabilitation and Ageing, B Floor, The Medical School, Queens Medical Centre, Nottingham, NG7 2UH; mcxlh3{at}


Objectives: To compare versions 8 and 10 of the Orchard Sports Injury Classification System (OSICS) to determine whether the revised version of OSICS has improved its use in a sports medicine setting, and to assess the inter-rater reliability of OSICS-10.

Methods: Injury surveillance data, gathered over a 2 year period in professional football, cricket and rugby union to produce 335 diagnoses, were coded with both OSICS-8 and OSICS-10. Code–diagnosis agreement was assessed for OSICS-8 in terms of whether a diagnosis was codeable or noncodeable, and for OSICS-10 by evaluating the highest available OSICS-10 tier of coding. Eight clinicians coded a list of 20 diagnoses, comprising a range of pathologies to all gross anatomical regions, which were compared to assess inter-rater reliability.

Results: All diagnoses could be assigned an appropriate code with OSICS-10, compared with 87% of diagnoses that could be assigned an OSICS-8 code. Contusions comprised almost half of OSICS-8 noncodeable diagnoses. OSICS-10 tier 2 codes accounted for 20% of diagnoses coded with the updated system. Of these 20%, almost half contained a more detailed diagnosis that did not have an available OSICS-10 tier 3 or 4 code. Inter-rater reliability increased with decreasing diagnostic detail, with an overall level shown to be moderate (k = 0.56).

Conclusions: OSICS-10 is a more encompassing system than OSICS-8 to use in classifying sports medicine diagnoses, and has a moderate level of inter-rater reliability. Further minor revision may be required to address lack of detail in some strain, effusion and contusion codes.

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  • Competing interests: None.