. 2019 Oct 1;41(1):921–929. doi: 10.1080/0886022X.2019.1666724

Table 3.

Comparison of differences in parameters before and after PTX.

	iPTH (pg/mL)	ALP (u/L)	Ca (mmol/L)	P (mmol/L)	Ca × P (mg²/dL²)
Preop (n = 182)	1638.75 (1182.10, 2330.68)	305.50 (163.00, 607.00)	2.73 ± 0.29	2.25 ± 0.50	75.88 ± 18.49
Intrao (n = 182)	204.20 (122.58, 367.08)^a	/	/	/	/
1.w (n = 182)	30.75 (7.65, 108.73)^a	321.70 (193.75, 653.75)^a	1.95 ± 0.22^a	1.16 ± 0.35^a	27.98 ± 9.71^a
3.m (n = 157)	54.30 (16.10, 214.75)^a	223.00 (102.00, 443.00)^a	2.00 ± 0.22^a	1.22 ± 0.34^a	30.26 ± 9.84^a
6.m (n = 146)	63.65 (29.48, 244.50)^a	107.50 (66.75, 216.50)^a	2.07 ± 0.21^a	1.27 ± 0.34^a	32.80 ± 10.00^a
12.m (n = 146)	59.20 (31.10, 166.43)^a	99.00 (71.00, 135.00)^a	2.26 ± 0.30^a	1.49 ± 0.33^a	42.10 ± 11.77^a

PTX: parathyroidectomy; iPTH: intact parathyroid hormone; ALP: alkaline phosphatase; Ca: serum calcium; P: serum phosphorus; Ca × P: calcium phosphorus product; Preop: Preoperative; Intrao: intraoperative; 1.w: 1 week after operation; 3.m: 3 months after operation; 6.m: 6 months after operation; 12.m: 12 months after operation; /: not monitored. iPTH and ALP levels are expressed as the median (interquartile range); Ca, P, and Ca × P are expressed as the mean ± standard deviation; Continuous data were analyzed by the t-test. The measurement of data with skewed distributions were expressed by median (interquartile range), and a nonparametric rank sum test was used for inter-group comparison. A probability value of ^ap < 0.05 was considered to be statistically significant.