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Table 1 Characteristic of subjects in PHPT, NPHPT, SHPT and Health groups

From: New parathyroid function index for the differentiation of primary and secondary hyperparathyroidism: a case-control study

 PHPT(n = 92)NPHPT(n = 36)SHPT(n = 37)Healthy(n = 45)
Age (years)47.7 ± 15.5 b53.7 ± 15.946.0 ± 12.145.1 ± 12.3
Gender(M/F)36/5610/2637/045/0
Serum calcium
(2.1–2.7 mmol/L)*
3.24 ± 0.82a2.59 ± 0.10 a2.19 ± 0.072.21 ± 0.11
Serum phosphate
(0.81–1.45 mmol/L)
0.77 ± 0.34a0.79 ± 0.15 a1.06 ± 0.151.07 ± 0.15
PTH
(14.5–62.7 pg/mL)
884 ± 863a252 ± 23994.8 ± 28.652.6 ± 9.09
25(OH)D
(19.08–57.6 ng/mL)
11.7 ± 4.0a14.0 ± 5.02a13.8 ± 2.63a17.6 ± 6.74
Calcium×PTH395 ± 40272.4 ± 69.023.3 ± 48.412.3 ± 48.4
Lg Calcium×PTH**2.31 ± 0.46 a1.75 ± 0.26 a1.37 ± 0.011.12 ± 0.10
PFindex454 ± 430101 ± 11121.7 ± 6.3812.2 ± 2.98
LgPFindex**2.44 ± 0.46 a1.87 ± 0.31 a1.35 ± 0.121.10 ± 0.11
Ca/P4.63 ± 1.40 a3.35 ± 0.71 a2.11 ± 0.342.10 ± 0.35
  1. *: serum calcium was corrected by albumin. **: normal transformation
  2. a: P<0.01 b: P<0.05