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Table 6 ROC-analysis of stress sonography and 3SAM

From: Clinical evaluation of manual stress testing, stress ultrasound and 3D stress MRI in chronic mechanical ankle instability

Method Cut-off value Sensitivity Specificity
Stress sonography 3.6 mm 1.0 0.4
5.2 mm 0.92 0.6
6.6 mm 0.71 0.68
7.2 mm 0.71 0.8
8.3 mm 0.5 0.92
CCAFT 26.2% 1.0 0.36
33.0% 0.92 0.48
43.0% 0.71 0.8
49.2% 0.5 0.88
  1. CCAFT relative reduction in fibulotalar CCA in plantarflexion-supination position
  2. Stress sonography as cumulative difference between ligament lengths of ATFL and CFL at rest vs. 150 N stress