Inter- and intra-observer variation of the Schatzker and AO/OTA classifications of tibial plateau fractures and a proposal of a new classification system.

Abstract:

INTRODUCTION:The aim of this study was to evaluate the intra- and inter-observer variation of the Schatzker and AO/OTA classifications in assessing tibial plateau fractures, using plain radiographs. PATIENTS AND METHODS:Fifty tibial plateau fractures were classified independently by six observers as per the Schatzker and AO/OTA classifications, using antero-posterior and lateral plain radiographs. Assessment was done on two occasions, 8 weeks apart. RESULTS:We found that both the Schatzker and AO/OTA classifications have a high intra-observer (kappa = 0.57 and 0.53, respectively), and inter-observer (kappa = 0.41 and 0.43, respectively) variation. Classification of tibial plateau fractures into unicondylar versus bicondylar and pure splits versus articular depression +/- split conferred improved inter- and intra-observer variation. CONCLUSIONS:The high inter-observer variation found for the Schatzker and AO/OTA classifications must be taken into consideration when these are used as a guidance of treatment and when used in evaluating patients' outcome. Simply classifying tibial plateau fractures into unicondylar versus bicondylar and pure splits versus articular depression +/- split may be more reliable.

journal_name

Ann R Coll Surg Engl

authors

Charalambous CP,Tryfonidis M,Alvi F,Moran M,Fang C,Samarji R,Hirst P

doi

10.1308/003588407X187667

subject

Has Abstract

pub_date

2007-05-01 00:00:00

pages

400-4

issue

4

eissn

0035-8843

issn

1478-7083

journal_volume

89

pub_type

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