Title: Inter-rater reliability of common quantitative knee X-ray parameters in the Indian scenario
Abstract: The reliability of knee radiograph measurements is an important factor to consider for these measurements to be a useful tool in patient evaluation. Inter-rater reliability of the common knee radiograph measurements like patellar height and sulcus angle has never been established among observers of varied expertise in the Indian setting. Research has established that ethnic differences exist in knee morphology among different races and deep squatters like Indians have different knee anatomy. Globally, there is very limited published literature evaluating reliability of sulcus angle measurement on X-rays. We performed a study to evaluate the inter-rater reliability of 3 patellar height indices and sulcus angle in the Indian scenario among observers of varied expertise. The participants were males and females between 18 and 54 years, both, with anterior knee pain and without any knee complaints. Three independent observers from Sports Medicine, Orthopaedic Surgery and Radiology assessed 148 radiographs including 74 lateral and 74 axial views from 74 participants. All the measurements were analysed for Intraclass Correlation Coefficient (2,1). All patellar height indices had moderate to good reliability. Insall Salvati index (ICC 0.74) and Caton Deschamp index (ICC 0.74) had better reliability among our observers than Blackburne Peel index (ICC 0.67). Sulcus angle had an excellent reliability (ICC 0.92) in our study. In the Indian scenario, there is an excellent inter-rater reliability for sulcus angle and moderate to good reliability for Insall-Salvati index, Caton-Deschamp index and Blackburne-Peel index, in that order, among 3 independent raters of varied expertise.
Publication Year: 2016
Publication Date: 2016-09-01
Language: en
Type: article
Indexed In: ['crossref']
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