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. Author manuscript; available in PMC: 2011 Jun 18.
Published in final edited form as: J Biomech. 2010 Apr 10;43(9):1702–1707. doi: 10.1016/j.jbiomech.2010.02.033

Table 4.

Sensitivity and specificity of predicted ACL injuries based on intercondylar notch (ICN) width at the inlet only and of the combined model (ACL volume, lateral plateau slope, and ICN inlet width). PPV = Positive Predictive Value; NPV = Negative Predictive Value

Intercondylar Notch
Width Inlet Only 		Injured
(Actual)		 Non-Injured
(Actual)
Injured
(Predicted)		 20 9 PPV = 69%
Non-Injured
(Predicted)		 7 18 NPV = 72%
Sensitivity =
74%		 Specificity =
67%
ACL Vol, Lat Plat,
ICN Inlet 		Injured
(Actual)		 Non-Injured
(Actual)
Injured
(Predicted)		 19 9 PPV = 68%
Non-Injured
(Predicted)		 8 18 NPV = 69%
Sensitivity =
70%		 Specificity =
67%