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Comparing MRI and conventional radiography for the detection of structural changes indicative of axial spondyloarthritis in the ASAS cohort
Rheumatology ( IF 4.7 ) Pub Date : 2022-08-11 , DOI: 10.1093/rheumatology/keac432
Mikhail Protopopov 1 , Fabian Proft 1 , Stephanie Wichuk 2 , Pedro M Machado 3 , Robert G Lambert 4 , Ulrich Weber 5 , Susanne Juhl Pedersen 6, 7 , Mikkel Østergaard 6, 7 , Joachim Sieper 1 , Martin Rudwaleit 8 , Xenofon Baraliakos 9 , Walter P Maksymowych 3 , Denis Poddubnyy 1, 10
Affiliation  

Objectives To compare magnetic resonance imaging (MRI) and conventional radiography of sacroiliac joints (SIJs) for detection of structural lesions typical for axial spondyloarthritis (axSpA). Methods Adult patients from the Assessment of SpondyloArthritis international Society (ASAS) cohort with symptoms suggestive of axSpA and both SIJ MRIs and radiographs available for central reading were included. Radiographs were evaluated by three readers according to the modified New York (mNY) criteria grading system. The presence of structural damage on radiographs was defined as 1) fulfilment of the radiographic mNY criterion and 2) additionally, a lower threshold for sacroiliitis of at least grade 2 unilaterally. MRI scans were assessed for the presence of structural changes indicative of axSpA by 7 readers. Diagnostic performance (sensitivity—Se, specificity—Sp, positive and negative predictive values—PPV and NPV—and positive and negative likelihood ratios—LR+ and LR-) of MRI and radiographs (vs rheumatologist’s diagnosis of axSpA) were calculated. Results Overall, 183 patients were included, 135 (73.7%) were diagnosed with axSpA. Structural lesions indicative of axSpA on MRI had Se 38.5%, Sp 91.7%, PPV 92.9%, NPV 34.6%, LR + 4.62, LR- 0.67. Sacroiliitis according to the mNY criteria had Se 54.8%, Sp 70.8%, PPV 84.1%, NPV 35.8%, positive LR + 1.88, LR- 0.64. Radiographic sacroiliitis of at least grade 2 unilaterally had Sn 65.2%, Sp 50.0%, PPV 78.6%, NPV 33.8%, LR + 1.30, LR- 0.69. Conclusion Structural lesions of SIJ detected by MRI demonstrated better diagnostic performance and better inter-reader reliability compared with conventional radiography.

中文翻译:

在 ASAS 队列中比较 MRI 和常规 X 光检查指示中轴脊柱关节炎的结构变化

目的 比较磁共振成像 (MRI) 和常规放射成像的骶髂关节 (SIJ) 检测中轴型脊柱关节炎 (axSpA) 的典型结构性病变。方法 包括来自国际脊柱关节炎协会 (ASAS) 评估队列的成年患者,这些患者具有提示 axSpA 的症状并且 SIJ MRI 和 X 光片可用于集中阅读。根据修改后的纽约 (mNY) 标准分级系统,由三名读者评估射线照片。射线照片上存在结构性损伤定义为 1) 满足射线照相 mNY 标准和 2) 此外,单侧至少 2 级骶髂关节炎的下限阈值。7 名读者对 MRI 扫描进行了评估,以确定是否存在指示 axSpA 的结构变化。诊断性能(灵敏度—Se,计算了 MRI 和放射照片的特异性——Sp、阳性和阴性预测值——PPV 和 NPV——以及阳性和阴性似然比——LR+ 和 LR-(与风湿病学家对 axSpA 的诊断相比)。结果 总体而言,共纳入 183 名患者,其中 135 名 (73.7%) 被诊断为 axSpA。MRI 上指示 axSpA 的结构性病变具有 Se 38.5%、Sp 91.7%、PPV 92.9%、NPV 34.6%、LR + 4.62、LR- 0.67。根据 mNY 标准的骶髂关节炎具有 Se 54.8%、Sp 70.8%、PPV 84.1%、NPV 35.8%、阳性 LR + 1.88、LR- 0.64。至少 2 级单侧放射学骶髂关节炎有 Sn 65.2%、Sp 50.0%、PPV 78.6%、NPV 33.8%、LR + 1.30、LR- 0.69。结论 与传统 X 线摄影相比,MRI 检测到的 SIJ 结构性病变表现出更好的诊断性能和更好的读者间可靠性。计算了 MRI 和放射照片的阳性和阴性预测值(PPV 和 NPV)以及阳性和阴性似然比(LR+ 和 LR-)(与风湿病学家对 axSpA 的诊断相比)。结果 总体而言,共纳入 183 名患者,其中 135 名 (73.7%) 被诊断为 axSpA。MRI 上指示 axSpA 的结构性病变具有 Se 38.5%、Sp 91.7%、PPV 92.9%、NPV 34.6%、LR + 4.62、LR- 0.67。根据 mNY 标准的骶髂关节炎具有 Se 54.8%、Sp 70.8%、PPV 84.1%、NPV 35.8%、阳性 LR + 1.88、LR- 0.64。至少 2 级单侧放射学骶髂关节炎有 Sn 65.2%、Sp 50.0%、PPV 78.6%、NPV 33.8%、LR + 1.30、LR- 0.69。结论 与传统 X 线摄影相比,MRI 检测到的 SIJ 结构性病变表现出更好的诊断性能和更好的读者间可靠性。计算了 MRI 和放射照片的阳性和阴性预测值(PPV 和 NPV)以及阳性和阴性似然比(LR+ 和 LR-)(与风湿病学家对 axSpA 的诊断相比)。结果 总体而言,共纳入 183 名患者,其中 135 名 (73.7%) 被诊断为 axSpA。MRI 上指示 axSpA 的结构性病变具有 Se 38.5%、Sp 91.7%、PPV 92.9%、NPV 34.6%、LR + 4.62、LR- 0.67。根据 mNY 标准的骶髂关节炎具有 Se 54.8%、Sp 70.8%、PPV 84.1%、NPV 35.8%、阳性 LR + 1.88、LR- 0.64。至少 2 级单侧放射学骶髂关节炎有 Sn 65.2%、Sp 50.0%、PPV 78.6%、NPV 33.8%、LR + 1.30、LR- 0.69。结论 与传统 X 线摄影相比,MRI 检测到的 SIJ 结构性病变表现出更好的诊断性能和更好的读者间可靠性。
更新日期:2022-08-11
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