The best cutoff value in predicting hypocalcemia for PTH-SC was 1.5 pmol/L (Youden’s index 0.618, sensitivity 73.0 %, specificity 88.9 %) and for PTH-D1 was 0.9 pmol/L (Youden’s index 0.589, sensitivity 70.3 %, specificity 90.6 %). Here, PTH is linked to Hypocalcemia.