Table 2 Calcium and parathyroid hormone levels at different time points in both study groups [Median (Q1-Q3)]. Q1 and Q3: represent the first quartile (25th percentile) and third quartile (75th percentile), respectively; Ca0: preoperative calcium levels; Ca1: calcium levels one day postsurgery; Ca2: calcium levels one week postsurgery; PTH0: preoperative parathyroid hormone (PTH) levels; PTH1: PTH levels one day postsurgery; PTH2: PTH levels one week postsurgery.

From: Enhancing parathyroid preservation in papillary thyroid carcinoma surgery using nano-carbon suspension

Variable

Total (n = 219)

Control group

(n = 112)

Experimental group

(n = 107)

P value

Ca0 (mmol/L)

2.33 (2.30–2.36)

2.31 (2.25–2.35)

2.34 (2.30–2.36)

0.268

Ca1 (mmol/L)

2.19 (2.01–2.22)

2.06 (1.99–2.20)

2.22 (2.15–2.30)

< 0.001

Ca2 (mmol/L)

2.25 (2.21–2.33)

2.22 (2.13–2.30)

2.29 (2.23–2.38)

< 0.001

PTH0 (pg/mL)

41 (39–44)

41.5 (39–44)

41 (38–45)

0.754

PTH1 (pg/mL)

32 (27–37)

28 (25–34)

35 (30–39.5)

< 0.001

PTH2 (pg/mL)

34 (30–39.5)

30 (27–37)

37 (33–40)

< 0.001

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