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A new method of estimation of interobserver variation and its application to the radiological assessment of osteoarthrosis in hip joints
Author(s) -
KjærsgaardAndersen Per,
Christensen Finn,
Schmidt Steen Asmus,
Pedersen Niels Wisbech,
Jøensen Bent
Publication year - 1988
Publication title -
statistics in medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.996
H-Index - 183
eISSN - 1097-0258
pISSN - 0277-6715
DOI - 10.1002/sim.4780070603
Subject(s) - radiological weapon , medicine , variation (astronomy) , statistical analysis , statistics , orthodontics , nuclear medicine , mathematics , radiology , physics , astrophysics
Four frequently referenced radiological methods for assessment of osteoarthrosis in hip joints are compared with respect to their interobserver variation. One hundred hip joints were rated by four observers. Each observer applied all four methods to all the radiographs. The results were analysed by a new statistical method, which allowed detailed assessment of the nature and extent of interobserver variation. Significant differences in terms of intraobserver disagreement were found, and Heripret's method was the best in this respect. All four methods showed a significant degree of systematic disagreement among the observers. This suggests that the interobserver variation might be reduced by confronting the observers with the results of the statistical analysis of their judgements.