Table 4. Sensitivity, specificity, positive (PPV) and negative predictive values of HER-2 overexpression in predicting DFS and PFS.

HER-2 overexpression	Disease-Free Survival	Progression-Free Survival
Sensitivity	58% (95% CI 43%-73%)	65% (95% CI 42%-87%)
Specificity	83% (95% CI 68%-98%)	65% (95% CI 51%-79%)
PPV	86% (95% CI 74%-99%)	41% (95% CI 22%-59%)
NPV	53% (95% CI 37%-69%)	83% (95% CI 71%-96%)