ALB and Hypocalcemia: Variables with a p-value of less than 0.1 in single‐factor analysis, including age, preoperative iPTH levels, ALP levels, serum calcium levels, serum phosphorus levels, serum albumin levels, hemoglobin levels and the mass of excised glands, were chosen for further binary logistic regression, and forward stepwise regression was used to identify risk factors for severe hypocalcemia.