Volume 63, Issue 2, Pages 662-669 (February 2003) Bone mineral density and urine calcium excretion among subjects with and without nephrolithiasis  John R. Asplin, Kimberly A. Bauer, Jennifer Kinder, Georg Müller, Brian J. Coe, Joan H. Parks, Fredric L. Coe  Kidney International  Volume 63, Issue 2, Pages 662-669 (February 2003) DOI: 10.1046/j.1523-1755.2003.00763.x Copyright © 2003 International Society of Nephrology Terms and Conditions

Figure 1 Z-scores of femoral neck and vertebral body BMD in stone formers and non-stone formers. Quantile plots of femoral neck (A) and vertebral body (B) bone mineral density (BMD), expressed as z-scores, among stone formers (•) and non-stone formers (○) do not differ. Kidney International 2003 63, 662-669DOI: (10.1046/j.1523-1755.2003.00763.x) Copyright © 2003 International Society of Nephrology Terms and Conditions

Figure 2 Z-scores of femoral neck and vertebral body BMD versus age. Among women (A and B) vertebral body BMD z-scores varied positively with age, among NSF (○) and SF (•); femoral neck z-score of women (A) nor BMD at either site among men (C and D) vary with age. Ellipses are 1 SE areas of containment for the total points on the graphs. Kidney International 2003 63, 662-669DOI: (10.1046/j.1523-1755.2003.00763.x) Copyright © 2003 International Society of Nephrology Terms and Conditions

Figure 3 Calcium intake, urine calcium excretion and calcium intake minus excretion. The distribution of calcium intakes (A) among stone formers (•) lacked the high tail present among non-stone formers (○). Distributions of urine calcium excretions (B) overlap. Consequently, the distributions of calcium intake minus excretion (C) mirror those of intake. Kidney International 2003 63, 662-669DOI: (10.1046/j.1523-1755.2003.00763.x) Copyright © 2003 International Society of Nephrology Terms and Conditions

Figure 4 Z-scores of femoral neck and vertebral BMD versus urine calcium excretion, in men and women stone formers and non-stone formers. Among NSF (A and B) femoral and spine BMD values do not vary with urine calcium. Among SF (C and D) BMD at both sites varies inversely with urine calcium among men (•) and women (▴). Kidney International 2003 63, 662-669DOI: (10.1046/j.1523-1755.2003.00763.x) Copyright © 2003 International Society of Nephrology Terms and Conditions

Figure 5 Z-scores of femoral neck and vertebral BMD versus calcium intake, in men and women stone formers and non-stone formers. Among NSF (A and B) femoral BMD values do not vary with calcium intake (A) whereas spine BMD values vary positively with calcium intake (B). Among SF (C and D) BMD at both sites do not vary with calcium intake among men (•) and women (▴). Kidney International 2003 63, 662-669DOI: (10.1046/j.1523-1755.2003.00763.x) Copyright © 2003 International Society of Nephrology Terms and Conditions

Figure 6 Z-scores of femoral neck and vertebral BMD versus urine ammonium excretion, in men and women stone formers and non-stone formers. Among NSF (A and B) neither femoral nor vertebral BMD z-score values vary with urine ammonium excretion among men (•) and women (▴), whereas both BMD z-score values vary inversely with urine ammonium among SF (C and D). Kidney International 2003 63, 662-669DOI: (10.1046/j.1523-1755.2003.00763.x) Copyright © 2003 International Society of Nephrology Terms and Conditions