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Table 4 Diagnostic utility and cut-off values of FCLs at different spinal levels in diagnosing axSpA

From: Fatty corner lesions in T1-weighted magnetic resonance imaging as an alternative to sacroiliitis for diagnosis of axial spondyloarthritis

  AUC Stand Error p-value 95% CI
All spinal lesions
 Whole spine 0.615 0.036 0.01 0.545; 0.685
 Cervical 0.544 0.039 0.29 0.467; 0.620
 Thoracic 0.638 0.035 0.001 0.570; 0.707
 Lumbar 0.561 0.039 0.14 0.486; 0.637
Anterior lesions
 Whole spine 0.622 0.036 0.003 0.551; 0.692
 Cervical 0.535 0.040 0.40 0.457; 0.612
 Thoracic 0.640 0.035 0.001 0.572; 0.708
 Lumbar 0.576 0.039 0.07 0.500; 0.652
Posterior lesions
 Whole spine 0.567 0.038 0.11 0.492; 0.641
 Cervical 0.521 0.040 0.61 0.442; 0.600
 Thoracic 0.560 0.038 0.15 0.485; 0.635
Lumbar 0.527 0.040 0.52 0.449; 0.605
  Cut-off threshold (no of FCLs) Sensitivity (%) Specificity (%)
Anterior whole spine FCLs ≥3 26.9 93.5
≥4 22.7 95.2
≥5 20.6 96.8
Anterior thoracic FCLs ≥1 31.5 90.3
≥2 26.5 95.2
≥3 18.5 98.4
  1. FCL fatty corner lesion, axSpA axial spondyloarthritis, AUC area under curve, CI confidence interval