Association of 25-hydroxyvitamin D with areal and volumetric measures of bone mineral density and parathyroid hormone: impact of vitamin D-binding protein and its assays

. Author manuscript; available in PMC: 2017 Feb 1.

Published in final edited form as: Osteoporos Int. 2015 Sep 10;27(2):617–626. doi: 10.1007/s00198-015-3296-6

a	K_dbpK_albalbumin+K_dbp
b	(K_dbpDBP)−(K_dbp25(OH)D)+(K_alb*albumin)+1
c	−[25(OH)D]
K_dbp	affinity constant between 25(OH)D and DBP
K_alb	affinity constant between 25(OH)D and albumin