PTH and secondary hyperparathyroidism: Serum intact PTH, calcium, and phosphate levels were 489 ± 285 pg/mL, 9.6 ± 0.4 mg/dL, and 6.2 ± 1.3 mg/dL, respectively, indicating that all had secondary hyperparathyroidism according to the 2006 Japanese Guidelines for management of secondary hyperparathyroidism in dialysis patients23.