Intertester reliability of sonography in patellar tendinopathy

Black, Jennifer, Cook, Jill, Kiss, Z. Stephen and Smith, Michael 2004, Intertester reliability of sonography in patellar tendinopathy, Journal of ultrasound in medicine, vol. 23, no. 5, pp. 671-675.

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Title Intertester reliability of sonography in patellar tendinopathy
Author(s) Black, Jennifer
Cook, Jill
Kiss, Z. Stephen
Smith, Michael
Journal name Journal of ultrasound in medicine
Volume number 23
Issue number 5
Start page 671
End page 675
Publisher American Institute of Ultrasound in Medicine
Place of publication Rockville, MD.
Publication date 2004
ISSN 0098-0382
0278-4297
Keyword(s) diagnosis
patella
reliability
sonography
tendinopathy
Summary Objective. Intertester reliability is imperative during the sonographic assessment of patellar tendinopathy because hypoechoic areas can change over time, and repeated examination may involve multiple examiners. Given that, to our knowledge, it has not been reported in the literature, the objective of this study was to investigate the intertester reliability of sonography for the detection and measurement of hypoechoic areas associated with patellar tendinopathy.

Methods. The study cohort comprised 8 patients with clinically diagnosed patellar tendinopathy and 4 patients with bilateral asymptomatic patellar tendons. Two equally experienced musculoskeletal radiologists imaged both patellar tendons from each patient (n = 24). All 24 tendons were assessed on the same day with the use of identical sonography machines.

Results. The radiologists had 100% chance-corrected agreement for detecting 12 normal (hypoechoic free) and 12 abnormal (hypoechoic) tendons. All measurement data were normally distributed (P > .05), and a range of hypoechoic area sizes was evident. No statistically significant differences were found for the measurements of hypoechoic area, axial plane height and width, and sagittal plane height (P > .05). In addition, these measurements were equally highly correlated (Pearson r > 0.87; P < .01).

Conclusions. The results reported in this study suggest that the intertester
reliability of sonography for the assessment of patellar tendinopathy is high. Although these results are encouraging, a small sample was analyzed, and this increases the probability of type II measurement error. Larger studies are therefore required to confirm these findings. High intertester reliability indicates that multiple experienced radiologists can reliably assess the same tendon and provides researchers with a necessary foundation for furthering research in tendon rehabilitation.
Language eng
Field of Research 110314 Orthopaedics
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2004, American Institute of Ultrasound in Medicine
Persistent URL http://hdl.handle.net/10536/DRO/DU:30009242

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