Table 3 Comparison of laboratory results for active and inactive rheumatoid arthritis patients

Biochemical, mean ± SD

 Corrected calcium, mg/dl

9.2 ± 0.36

9.2 ± 0.35

0.959

 Phosphorus, mg/dl

3.1 ± 0.54

2.9 ± 0.67

0.278

 GFR, ml/min

100.7 ± 20.31

103.1 ± 22.61

0.688

Hormonal, median (min–max)

 25-hydroxyvitamin D, ng/ml

10 (4–40)

9.5 (3–34)

0.872

 PTH, pg/ml

67 (24–474)

66 (16–172)

0.586

 Fgf23, pg/ml

22.12 (13.90–51.02)

17.71 (11.20–31.19)

0.001^*