Table 3. A confusion matrix of predictive results from the LR predictor at 4 years for the independent dataset of Site #3.

Site #3 at 4 years	Predicted Unfavorable Outcome	Predicted Favorable Outcome	Totals
Unfavorable Outcome	16	10	26
Favorable Outcome	5	29	34
Totals	21	39	60

The LR predictor had a sensitivity of 85%, and a specificity of 62%. These results yield a positive predictive value (PPV) of 74% and a negative predictive value (NPV) of 76%.