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Table 3 Cut-off values for the prediction of clinical pregnancy rates

From: Is a high serum copper concentration a risk factor for implantation failure?

Parameter Cut-off Sensitivity Specificity PPV NPV
Copper 159/160 0.88 0.26 0.68 0.57
Zinc 89/90 0.88 0.34 0.71 0.62
Cu/Zn ratio 1.59/1.60 0.98 0.29 0.71 0.88
  1. PPV positive predictive value, NPV negative predictive value