Table 3. Incidence of postoperative hypocalcemia according to study groups.

Values (in mmol/L)	Group				p
	I		II
Preop					0.2205
0.8 to 1.1	5	18.5%	1	5.0%
Normal	22	81.5%	19	95.0%
POi					0.0254*
0.8 to 1.1	17	63.0%	6	30.0%
Normal	10	37.0%	14	70.0%
PO7					0.2912
< 0.8	1	3.7%	1	5.0%
0.8 to 1.1	11	40.7%	4	20.0%
Normal	15	55.6%	15	75.0%
PO90					0.1315*
0.8 to 1.1	11	40.7%	4	20.0%
Normal	16	59.3%	16	80.0%
PO180					0.0409
< 0.8	2	7.4%	1	5.0%
0.8 to 1.1	6	22.2%	0	0.0%
Normal	19	70.4%	19	95.0%

Fisher’s test / * Chi-square test.

Preop: preoperative; Poi: immediate postoperative; PO7: 7 days after surgery; PO90: 90 days after surgery; PO180: 180 days after surgery.