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Ginsberg C, Blackwell T, Cheng JH, Potok OA, Cauley JA, Ensrud KE, Hsu S, Kado DM, Orwoll E, Cawthon PM, Ix JH. The Vitamin D Metabolite Ratio Is Associated With Volumetric Bone Density in Older Men. J Clin Endocrinol Metab 2024; 109:e513-e521. [PMID: 37804103 PMCID: PMC10795912 DOI: 10.1210/clinem/dgad587] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 07/19/2023] [Revised: 09/08/2023] [Accepted: 10/02/2023] [Indexed: 10/08/2023]
Abstract
CONTEXT Serum 25-hydroxyvitamin D (25(OH)D) is the current marker of vitamin D adequacy, but its relationship with bone health has been inconsistent. The ratio of 24,25-dihydroxyvitamin D3 to 25(OH)D3 (vitamin D metabolite ratio or VMR) is a marker of vitamin D that has been associated with longitudinal changes in bone mineral density (BMD) and fracture risk. OBJECTIVE High-resolution peripheral quantitative computed tomography (HR-pQCT) provides information on bone health beyond standard dual-energy x-ray absorptiometry, in that it measures volumetric BMD (vBMD) as well bone strength. The relationship of the VMR with vBMD and bone strength remains unknown. METHODS We evaluated the associations of the VMR and 25(OH)D3 with vBMD and bone strength in the distal radius and tibia, assessed by HR-pQCT in 545 older men participating in the Osteoporotic Fractures in Men (MrOS) Study. Primary outcomes were vBMD and estimated failure load (EFL, a marker of bone strength) at the distal radius and tibia. RESULTS The mean age was 84 ± 4 years, 88.3% were White, and 32% had an estimated glomerular filtration rate <60 mL/min/1.73 m2. In adjusted models, each twofold higher VMR was associated with a 9% (3%, 16%) higher total vBMD and a 13% (5%, 21%) higher EFL at the distal radius. Results were similar at the distal tibia. 25(OH)D3 concentrations were not associated with any of the studied outcomes. CONCLUSION Among older men, a higher VMR was associated with greater vBMD and bone strength while 25(OH)D3 was not. The VMR may serve as a valuable marker of skeletal health in older men.
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Affiliation(s)
- Charles Ginsberg
- Division of Nephrology-Hypertension, University of California, San Diego, CA 92037, USA
| | - Terri Blackwell
- California Pacific Medical Center Research Institute, Department of Epidemiology, University of California, SanFrancisco, San Francisco, CA 94107, USA
| | - Jonathan H Cheng
- Division of Nephrology-Hypertension, University of California, San Diego, CA 92037, USA
- Nephrology Section, Veterans Affairs San Diego Healthcare System, San Diego, CA 92161, USA
| | - O Alison Potok
- Division of Nephrology-Hypertension, University of California, San Diego, CA 92037, USA
- Nephrology Section, Veterans Affairs San Diego Healthcare System, San Diego, CA 92161, USA
| | - Jane A Cauley
- Department of Epidemiology, School of Public Health, University of Pittsburgh, Pittsburgh, PA 15261, USA
| | - Kristine E Ensrud
- Department of Medicine and Division of Epidemiology and Community Health, University of Minnesota, Minneapolis, MN 55455, USA
- Center for Care Delivery and Outcomes Research, Minneapolis Veterans Affairs Healthcare System, Minneapolis, MN 55417, USA
| | - Simon Hsu
- Division of Nephrology and Kidney Research Institute, Department of Medicine, University of Washington, Seattle, WA 98195, USA
| | - Deborah M Kado
- Department of Medicine, Stanford University, Palo Alto, CA 94304, USA
| | - Eric Orwoll
- Division of Endocrinology, Metabolism and Clinical Nutrition, Department of Medicine, Oregon Health and Sciences University, Portland, OR 97239, USA
| | - Peggy M Cawthon
- California Pacific Medical Center Research Institute, Department of Epidemiology, University of California, SanFrancisco, San Francisco, CA 94107, USA
| | - Joachim H Ix
- Division of Nephrology-Hypertension, University of California, San Diego, CA 92037, USA
- Nephrology Section, Veterans Affairs San Diego Healthcare System, San Diego, CA 92161, USA
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