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Published in: Osteoporosis International 11/2009

01-11-2009 | Original Article

Protective effect of total and supplemental vitamin C intake on the risk of hip fracture—a 17-year follow-up from the Framingham Osteoporosis Study

Authors: S. Sahni, M. T. Hannan, D. Gagnon, J. Blumberg, L. A. Cupples, D. P. Kiel, K. L. Tucker

Published in: Osteoporosis International | Issue 11/2009

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Abstract

Summary

Vitamin C may play a role in bone health. In the Framingham Study, subjects with higher total or supplemental vitamin C intake had fewer hip fractures and non-vertebral fractures as compared to subjects with lower intakes. Therefore, vitamin C may have a protective effect on bone health in older adults.

Introduction

Dietary antioxidants such as vitamin C may play a role in bone health. We evaluated associations of vitamin C intake (total, dietary, and supplemental) with incident hip fracture and non-vertebral osteoporotic fracture, over a 15- to 17-year follow-up, in the Framingham Osteoporosis Study.

Methods

Three hundred and sixty-six men and 592 women (mean age 75 ± 5 years) completed a food frequency questionnaire (FFQ) in 1988–1989 and were followed for non-vertebral fracture until 2003 and hip fracture until 2005. Tertiles of vitamin C intake were created from estimates obtained using the Willett FFQ, after adjusting for total energy (residual method). Hazard ratios were estimated using Cox-proportional hazards regression, adjusting for covariates.

Results

Over follow-up 100 hip fractures occurred. Subjects in the highest tertile of total vitamin C intake had significantly fewer hip fractures (P trend = 0.04) and non-vertebral fractures (P trend = 0.05) compared to subjects in the lowest tertile of intake. Subjects in the highest category of supplemental vitamin C intake had significantly fewer hip fractures (P trend = 0.02) and non-vertebral fractures (P trend = 0.07) compared to non-supplement users. Dietary vitamin C intake was not associated with fracture risk (all P > 0.22).

Conclusion

These results suggest a possible protective effect of vitamin C on bone health in older adults.
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Metadata
Title
Protective effect of total and supplemental vitamin C intake on the risk of hip fracture—a 17-year follow-up from the Framingham Osteoporosis Study
Authors
S. Sahni
M. T. Hannan
D. Gagnon
J. Blumberg
L. A. Cupples
D. P. Kiel
K. L. Tucker
Publication date
01-11-2009
Publisher
Springer-Verlag
Published in
Osteoporosis International / Issue 11/2009
Print ISSN: 0937-941X
Electronic ISSN: 1433-2965
DOI
https://doi.org/10.1007/s00198-009-0897-y

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