PTH and chronic kidney disease: Additionally, the National Kidney Foundation Kidney Disease Outcomes Quality Initiative (NKF K/DOQI) recommends PTH levels within a target range (> 150 to 300 pg/mL) [15], while the European Pediatric Dialysis Working Group (EPDWG) has recommended that PTH be monitored monthly and kept at two to three times the upper limit of the normal range in advanced CKD [12].