Table 2

Baseline characteristics (laboratory parameters) and correlation with PTH

ParameterMedian (IQR)Spearman correlation coefficient with PTHp Value
PTH (pg/ml)34 (26–44)
Fasting glucose (mg/dl)96 (88–108)0.050.10
Cystatin C (mg/l)1.0 (0.9–1.2)0.22<0.0001
NT-proBNP (pg/ml)557.3 (275.9–1094)0.21<0.0001
Lp-PLA2 (ng/ml)249.7 (207.9–317.2)0.070.03
hs-CRP (mg/l)3.5 (1.2–8.4)0.070.03
Total cholesterol (mg/dl)166 (146–191)−0.0050.88
HDL (mg/dl)39 (32–46)−0.0040.90
LDL (mg/dl)99 (80–118)−0.030.36
Triglycerides (mg/dl)127 (98–172)0.040.14
Creatinine clearance (ml/min)96.4 (81.0–117)−0.19<0.0001
25-OH-D (ng/ml)*22 (18–27)−0.25<0.0001
Osteocalcin (ng/ml)17 (14–22)0.22<0.0001
Calcium (mmol/l)2.6 (2.6–2.7)−0.100.0009
Phosphate (mmol/l)1.3 (1.2–1.5)−0.13<0.0001
  • * Seasonal variation of 25-hydroxyvitamin D (25-OH-D) was significant (p<0.0001) and opposite to PTH; mean levels of 25-OH-D were 21.7, 26.4, 25.0 and 21.3 ng/ml for spring, summer, autumn and winter, respectively.

  • hs-CRP, high-sensitive C-reactive protein; HDL, high-density lipoprotein; LDL, low-density lipoprotein; Lp-PLA2, Lipoprotein-associated phospholipase A2; NT-proBNP, N-terminal pro brain natriuretic peptide; PTH, parathyroid hormone; 25-OH-D, 25-hydroxyvitamin D.