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Table 3 Diagnostic Performance Among the Three MRI Measurementsa

From: Increased lateral femoral condyle ratio measured by MRI is associated with higher risk of noncontact anterior cruciate ligament injury

  Cut-off value Sensitivity Specificity Youden index AUC AUC:95%CI P valueb P valuec
LFCR 0.61 0.79 0.67 0.47 0.81 0.73-0.88 < 0.01
LTH 2.35 0.74 0.57 0.31 0.69 0.60-0.79 < 0.01 0.04
LFCR+LTH 0.46 0.83 0.76 0.59 0.85 0.78-0.92 < 0.01 0.11
  1. aMRI magnetic resonance imaging, LFCR lateral femoral condyle ratio, LTH lateral tibial height, AUC area under the curve
  2. bP value of each AUC tested against 0.5; binomial Z-test
  3. cP value of each AUC tested against the AUC for the LFCR; binomial Z-test