25. ย Subjects Within K/DOQI Target Ranges Adapted from LaClair RE, Hellman RN, Karp SL, et al: Prevalence of calcidiol deficiency in CKD: a cross-sectional study across latitudes in the United States. Am J Kidney Dis 45:1026โ1033, 2005. ย CKD 3 n = 65 (%) CKD 4 n = 113 (%) Calcidiol sufficient (>30 ng/mL) 29 17 Calcidiol insufficient (10โ30 ng/mL) 57 58 Calcidiol deficient (<10 ng/mL) 14 26