PTH and hypoparathyroidism: In our study, a PTH value at 6 hours postsurgery <10.10 pg/mL suggests, with high sensitivity and specificity, to be a very effective measure for identifying patients who would develop either transient [area under the curve (AUC) = 0.991, 95% confidence interval (CI) 0.978-1] and permanent hypoparathyroidism (AUC = 0.961, 95% CI 0.952-0.997).