SHBG and metabolic syndrome: Among patients without MetS, serum Ca concentration correlated with SHBG (R = 0.33 and p = 0.011) and osteocalcin (OC) (R = 0.28 and p = 0.038), while Ca concentration in bone correlated with the LAP index (R = 0.47 and p =0.003) and BMI (R = 0.35 and p = 0.017).