Table 1.

Patient characteristics (n = 546).

Variable
Sex
Male	158 (28.9)
Female	388 (71.1)
Age, years	50.9 ± 13.2
Preoperative diagnosis
Thyroid nodular goiter	123 (22.5)
Thyroid follicular tumor	83 (15.2)
Malignant tumor	340 (62.3)
Thyroid papillary carcinoma	322 (94.7)
Thyroid follicular carcinoma	12 (3.5)
Thyroid medullary carcinoma	4 (1.2)
Thyroid anaplastic carcinoma	2 (0.6)
Surgical procedure
Total thyroidectomy	230 (42.1)
Total thyroidectomy  plus central dissection	316 (57.9)
Preoperative baseline iPTH concentration, pg/mL	38.9 ± 13.7
Preoperative baseline calcium concentration, mmol/L	2.23 ± 0.093

Data are expressed as number (percentage) or mean ± standard deviation.

iPTH, intact parathyroid hormone.