Abstract
Objective
To evaluate the diagnostic performance of radiography for the detection of MRI-detected osteoarthritis-associated features in various articular subregions of the hip joint.
Materials and methods
Forty-four patients with chronic hip pain (mean age, 63.3 ± 9.5 years), who were part of the Hip Osteoarthritis MRI Scoring (HOAMS) cohort, underwent both weight-bearing anteroposterior pelvic radiography and 1.5 T MRI. The HOAMS study was a prospective observational study involving 52 subjects, conducted to develop a semiquantitative MRI scoring system for hip osteoarthritis features. In the present study, eight subjects were excluded because of a lack of radiographic assessment. On radiography, the presence of superior and medial joint space narrowing, superior and inferior acetabular/femoral osteophytes, acetabular subchondral cysts, and bone attrition of femoral head was noted. On MRI, cartilage, osteophytes, subchondral cysts, and bone attrition were evaluated in the corresponding locations. Diagnostic performance of radiography was compared with that of MRI, and the area under curve (AUC) was calculated for each pathological feature.
Results
Compared with MRI, radiography provided high specificity (0.76–0.90) but variable sensitivity (0.44–0.78) for diffuse cartilage damage (using JSN as an indirect marker), femoral osteophytes, acetabular subchondral cysts and bone attrition of the femoral head, and a low specificity (0.42 and 0.58) for acetabular osteophytes. The AUC of radiography for detecting overall diffuse cartilage damage, marginal osteophytes, subchondral cysts and bone attrition was 0.76, 0.78, 0.67, and 0.82, respectively.
Conclusions
Diagnostic performance of radiography is good for bone attrition, fair for marginal osteophytes and cartilage damage, but poor for subchondral cysts.
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Abbreviations
- OA:
-
Osteoarthritis
- OARSI:
-
Osteoarthritis Research Society International
- ACR:
-
American College of Rheumatology
- JSN:
-
Joint space narrowing
- TR:
-
Repetition time
- TE:
-
Echo time
- FOV:
-
Field of view
- PDw:
-
Proton density-weighted
- FS:
-
Fat-suppressed
- SE:
-
Spin echo
- HOAMS:
-
Hip osteoarthritis MRI scoring
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Acknowledgments
The authors would like to thank all the participants in this study for their time and efforts. We thank the staff of the Department of Radiology, Klinikum Augsburg, Germany for their support in image acquisition. We further wish to acknowledge the staff and management team at the “Private Practice for Musculoskeletal MRI”, Stadtbergen, Germany, who supported the HOAMS study. We thank Michael Ecker, Department of Orthopedic and Trauma Surgery, Klinikum Augsburg, for his support of patient coordination and for his valuable clinical input.
Funding source
The HOAMS study was supported by a grant of the “Private Practice for Musculoskeletal MRI”, Ulmer Landstr. 350, 86391 Stadtbergen, Germany. The funding source did not play any role in the study design, collection, analysis, and interpretation of data, in the writing of the manuscript, or in the decision to submit the manuscript for publication.
Disclosure
This study used data from the HOAMS study, and thus share the same cohort characteristics as those reported in our previous publication [Roemer FW et al. (2011), Osteoarthritis Cartilage 19:946–962]. However, what we reported in the present study does not overlap with any analytic results in our previous publication.
Conflict of interests
The third author is the President of Boston Imaging Core Lab (BICL), LLC and is a consultant to Genzyme, Stryker, Merck Serono, Novartis and Astra Zeneca. The 4th author is supported by an Australia Research Council (ARC) Future Fellowship and receives research or institutional support from ARC, NIH, and NHMRC. The senior author is CMO of BICL and is a consultant to MerckSerono and National Institute of Health. The 7th author is part of the Management Team of BICL (European Operation)
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Xu, L., Hayashi, D., Guermazi, A. et al. The diagnostic performance of radiography for detection of osteoarthritis-associated features compared with MRI in hip joints with chronic pain. Skeletal Radiol 42, 1421–1428 (2013). https://doi.org/10.1007/s00256-013-1675-7
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DOI: https://doi.org/10.1007/s00256-013-1675-7