Reproducibility of radiographic classification of scapholunate advanced collapse (SLAC) and scaphoid nonunion advanced collapse (SNAC) wrist
- 17 April 2013
- journal article
- research article
- Published by SAGE Publications in Journal of Hand Surgery (European Volume)
- Vol. 38 (7), 780-787
- https://doi.org/10.1177/1753193413484629
Abstract
The aim of this study was to measure inter- and intra-observer agreement on the radiographic classification of scapholunate advanced collapse (SLAC) and scaphoid nonunion advanced collapse (SNAC) wrist. Radiographs of 41 patients with SLAC wrist and 47 patients with SNAC wrist were graded on two separate occasions by four orthopaedic consultants specializing in hand and wrist surgery. Inter-observer agreement was evaluated using the multi-rater kappa value. Landis and Koch criteria were used to assess the level of agreement. Intra-observer agreement was tested by re-grading the radiographs after an interval of 2 to 4 weeks and calculating the weighted kappa value. For SLAC wrist, the inter-observer agreement was moderate (kappa value = 0.59) and intra-observer agreement substantial (kappa value = 0.65). For SNAC wrist, the inter-observer agreement was slight (kappa value = 0.20) and intra-observer agreement was fair (kappa value = 0.29). Radiographic classification of SLAC wrist has moderate reliability and reproducibility, whereas classification of SNAC wrist has limited reliability.Keywords
This publication has 29 references indexed in Scilit:
- Scaphoid nonunion in the presence of a degenerate carpus: don’t rush to salvage surgeryJournal of Hand Surgery (European Volume), 2011
- Evaluating Agreement: Conducting a Reliability StudyJournal of Bone and Joint Surgery, 2009
- Comparison of proximal row carpectomy and midcarpal arthrodesis for the treatment of scaphoid nonunion advanced collapse (SNAC-wrist) and scapholunate advanced collapse (SLAC-wrist) in stage IIJournal of Plastic, Reconstructive & Aesthetic Surgery, 2008
- Training improves agreement among doctors using the Neer system for proximal humeral fractures in a systematic reviewJournal of Clinical Epidemiology, 2008
- Reader Agreement StudiesAmerican Journal of Roentgenology, 2005
- Proximal row carpectomy: indications, surgical technique, and long-term resultsAtlas of the Hand Clinics, 2004
- Degenerative arthritis of the wrist: Proximal row carpectomy versus scaphoid excision and four-corner arthrodesisThe Journal of Hand Surgery, 2001
- The natural history of scaphoid non-unionArchives of orthopaedic and trauma surgery, 1996
- Surgical treatment of scapholunate advanced collapseThe Journal of Hand Surgery, 1994
- Large sample variance of kappa in the case of different sets of raters.Psychological Bulletin, 1979