A radiographic model predicting the status of the anterior cruciate ligament in varus knee with osteoarthritis

Table 4 Comparison of predictive factors and predictive model of anterior cruciate ligament-deficient (ACLD)

Variables	AUC (95% CI)	Youden index^b	Cut-off value	Sensitivity%	Specificity%	p
MWPPT%	0.906(0.829–0.983)	0.756	52.4	92.3	83.3	< 0.001
HKA (°)	0.703(0.574–0.832)	0.386	8.5	61.5	77.1	0.002
PTS (°)	0.740(0.621–0.860)	0.484	9.6	69.2	78.2	< 0.001
Predictive model^a	0.949(0.912–0.986)	0.754	0.1	96.2	79.2	< 0.001

AUC Area under the curve, CI Confidence interval, MWPPT% the maximum wear point of the proximal tibia%, HKA Hip–knee–ankle angle, PTS Posterior tibial slope
^a Predictive model: risk score = -27.147 + [0.342*MWPPT%] + [0.282*HKA] + [0.684*PTS]
^b Youden index = sensitivity + specificity—1

ISSN: 1471-2474