BGLAP and chronic kidney disease: However, it was observed that the concentration of fetuin A in study group was significantly lower than in controls (33.2 vs. 37.5 ng/ml, p = 0.018) while the level of osteocalcin was significantly higher in patients with CKD (13.6 ± 10.3 vs. 9.1 ± 6.0 ng/ml, p = 0.05).