Effect of Preoperative Vitamin D Deficiency on Hypocalcemia in Patients with Acute Hypoparathyroidism after Thyroidectomy

Table 5

Univariate and multivariate analysis for factors associated with significant postoperative hypocalcemia.

Covariates	Univariate analysis			Multivariate analysis
	β-Coefficient	Odds ratio (95% CI)	value	β-Coefficient	Odds ratio (95% CI)	value
Preoperative 25(OH)D level (ng/mL)	−0.18	0.83 (0.72–0.96)	0.01	−0.37	0.69 (0.52–0.90)	0.007
Duration of operation (minutes)	0.002	1.00 (0.99–1.01)	0.26
Intraoperative preservation of parathyroid glands	−0.22	0.80 (0.40–1.62)	0.54
Weight of excised gland (g)	−0.01	0.99 (0.98–1.01)	0.42
PTH level on postoperative day 0 (pg/mL)	−0.10	0.91 (0.73–1.12)	0.37
Percentage of PTH decline (%)	0.06	1.06 (0.98–1.14)	0.17
Postoperative magnesium level (mg/dL)	−4.77	0.01 (0.00–1.12)	0.06

A value < 0.05 indicates statistical significance. CI: confidence interval; 25(OH)D: 25-hydroxyvitamin D; PTH: parathyroid hormone; g: gram.