Parathyroid Hormone Reduction Predicts Transient Hypocalcemia after Total Thyroidectomy: A Single-Center Prospective Study

Table 3

The impact of surgical methods on the frequency of postoperative hypocalcemia and serum hormone level.

Variable	Bilateral group	Ipsilateral group
Age (year)	45.00 (37∼53)	48.00 (41∼58)	0.433^b
POD1 hypocalcemia	30.97% (48/155)	14.29% (3/21)	0.132^a
Gender (male)	5/48	0/3	1.000^a
PTH reduction (%)	62.20 (40.70∼83.93)	70.35 (19.71∼87.49)	0.943^b
Postoperative complications			0.645^a
Convulsion	30.97% (48/155)	42.86% (9/21)	0.319^a
Numbness	18.71% (29/155)	0 (0/21)	0.030 ^a
None	50.32% (78/155)	57.14% (12/21)	0.557^a
Preoperative serum PTH (pg/ml)	46.43 (37.6∼59.67)	42.34 (32.71∼66.11)	0.599^b
Preoperative serum Ca (mmol/l)	2.34 (2.27∼2.45)	2.36 (2.33∼2.45)	0.310^b

POD1/7/30/90/180, postoperative day 1, 7, 30, 90, and 180. ^aDifference between groups is tested by the χ [2] test; ^bdifference between groups is tested by the Mann–Whitney U test.