PTH and hypoparathyroidism: Gupta et al. [14] analyzed 90 total thyroidectomies and reported that intraoperative PTH starting from 10 min after removal of the thyroid, with a cut off value of 11.3 pg/mL (1.20 pmol/L), was the most accurate predictor for diagnosing postoperative hypoparathyroidism and had the highest sum of sensitivity (91.7%) and specificity (97%) compared to other parameters, a metric similar to the Youden’s J statistic used in our study.