Table 3. Demographic and clinical characteristics of 54 patients with protracted hypoparathyroidism who did or did not develop permanent hypoparathyroidism.

Characteristic	Permanent hypoparathyroidism		P value
	Yes (n=22)	No (n=32)
Age (years)	48 [14]	53 [15]	0.240*
Gender, n [%]			0.493†
Male	3 [27]	8 [73]
Female	19 [44]	24 [56]
Benign/malignant (n)	10/12	16/16	0.865†
Identified parathyroid glands	2.6 (0.9)	2.7 [1]	0.942*
Preoperative serum calcium (mg/dL)	9.3 (0.4)	9.4 (0.3)	0.263*
Preoperative iPTH (pg/mL)	42 [19]	54 [20]	0.039*
Preoperative 25-OH-D3 (ng/mL)	19 [9]	21 [8]	0.364*
Serum calcium 24 h after surgery (mg/dL)	7.2 (0.6)	7.4 (0.5)	0.194*
iPTH 24 h after surgery (pg/mL)	2.2 (3.6)	3.0 (0.5)	0.474*
iPTH 1 week after surgery (pg/mL)	2.1 (3.4)	2.9 (0.4)	0.474*
iPTH 1 month after surgery (pg/mL)	3.7 (3.9)	7.3 (4.2)	0.002*
Serum calcium 1 month after surgery (mg/dL)	8.9 (0.5)	9.7 (0.9)	0.002*
1, 25-OH2-D3 1 month after surgery (pg/mL)	34 [9]	41 [17]	0.074*
PGRIS categories, n [%]			0.911†
1–2	15 [68]	20 [63]
3–4	7 [32]	12 [37]

*, two-tailed Student-Fisher t-test for unpaired data and equivalent variances; ^†, χ² test. PGRIS, parathyroid glands remaining in situ.