Table 3.

Sensitivity, specificity, PPV, NPV and accuracy rates of 10 and 20 min PTH values in predicting surgical success (CI, confidence interval; PPV, positive predictive value; NPV, negative predictive value; PTH, parathyroid hormone).

	Sensitivity % (95%CI)	Specifcity % (95%CI)	PPV % (95%CI)	NPV % (95%CI)	Accuracy % (95%CI)
10 min PTH	89.8 (84.68–93.65)	71.43 (41.9–91.61)	97.78 (95.05–99.02)	33.33 (22.72–45.96)	88.57 (83.47–92.54)
20 min PTH	97.45 (94.15–99.17)	64.29 (35.14–87.24)	97.45 (94.98–98.72)	64.29 (41.06–82.30)	95.24 (91.42–97.69)