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. 2017 Sep 27;9:711–716. doi: 10.2147/IJWH.S141021

Table 2.

Predictive power of enzyme activity of SOD, GPx, and of the combined test

Enzyme system Sensitivity Specificity Accuracy PPV NPV
SOD 81.00 57.69 67.45 55.17 83.33
GPx 75.00 46.50 57.35 46.77 73.68
Combined 68.75 80.77 76.50 69.23 80.33

Abbreviations: SOD, superoxide dismutase; GPx, glutathione peroxidase; PPV, positive predictive value; NPV, negative predictive value.