Graphic Interpretation of Serum Parathyroid Hormone, Calcium, and Phosphorus Values in Primary Hyperparathyroidism Pai C. Kao, Ph.D., Edward G. Lufkin, M.D. Mayo Clinic Proceedings Volume 68, Issue 1, Pages 96-97 (January 1993) DOI: 10.1016/S0025-6196(12)60031-7 Copyright © 1993 Mayo Foundation for Medical Education and Research Terms and Conditions
Fig. 1 Graphic display of serum phosphorus, calcium, and parathyroid hormone (PTH) values in 361 patients with surgically proven primary hyperparathyroidism. Correlation between serum calcium and PTH values is significant (r = 0.434; P = 0.0001), as shown in right half of diagram. Inverse correlation between serum calcium and phosphorus (r = −0.339; P = 0.0001) is shown in left half of diagram. Shaded boxes = normal ranges for serum phosphorus, calcium, and PTH; open triangles (on left and right halves of diagram) = a patient's phosphorus, calcium, and PTH values. ICMA PTH = PTH values determined by immunochemiluminometric assay. Mayo Clinic Proceedings 1993 68, 96-97DOI: (10.1016/S0025-6196(12)60031-7) Copyright © 1993 Mayo Foundation for Medical Education and Research Terms and Conditions