PTH and chronic kidney disease: Small numbers of patients with advanced CKD were included (CKD stage 3b: n = 35, CKD stage 4 + 5: n = 20), but without stigmata of advanced CKD-MBD (mean PTH 54 [IQR 39–74] pg/mL, mean BAP 14.4 [SD 6.4] μg/L) [133].