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Effect of Calcium Supplementation on Bone Loss in Postmenopausal Women

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Reid, Ian R., Ames, Ruth W., Evans, Margaret C., Gamble, Gregory D., Sharpe, Susan J.·1993·New England Journal of Medicine
DOI 10.1056/nejm199302183280702
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Abstract

BACKGROUND: The use of calcium supplements slows bone loss in the forearm and has a beneficial effect on the axial bone density of women in late menopause whose calcium intake is less than 400 mg per day. However, the effect of a calcium supplement of 1000 mg per day on the axial bone density of postmenopausal women with higher calcium intakes is not known. METHODS: We studied 122 normal women at least three years after they had reached menopause who had a mean dietary calcium intake of 750 mg per day. The women were randomly assigned to treatment with either calcium (1000 mg per day) or placebo for two years. The bone mineral density of the total body, lumbar spine, and proximal femur was measured every six months by dual-energy x-ray absorptiometry. Serum and urine indexes of calcium metabolism were measured at base line and after 3, 12, and 24 months. RESULTS: The mean (+/- SE) rate of loss of total-body bone mineral density was reduced by 43 percent in the calcium group (-0.0055 +/- 0.0010 g per square centimeter per year) as compared with the placebo group (-0.0097 +/- 0.0010 g per square centimeter per year, P = 0.005). The rate of loss of bone mineral density was reduced by 35 percent in the legs (P = 0.02), and loss was eliminated in the trunk (P = 0.04). Calcium use was of significant benefit in the lumbar spine (P = 0.04), and in Ward's triangle the rate of loss was reduced by 67 percent (P = 0.04). Calcium supplementation had a similar effect whether dietary calcium intake was above or below the mean value for the group. Serum parathyroid hormone concentrations tended to be lower in the calcium group, as were urinary hydroxyproline excretion and serum alkaline phosphatase concentrations. CONCLUSIONS: Calcium supplementation significantly slowed axial and appendicular bone loss in normal post-menopausal women.

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Research works printed but not linked: 24

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Metadata

Authors
Reid, I. R., Ames, R. W., Evans, M. C., Gamble, G. D., & Sharpe, S. J.
Venue
New England Journal of Medicine
Publisher
Massachusetts Medical Society
Published
1993-02-18
Volume
328
Issue
7
Pages
460-464
ISSN
  • 0028-4793 (ISSN-L)
  • 1533-4406
DOI
10.1056/nejm199302183280702
OpenAlex
W2062934439
Cited by
512
References
0
FWCI
44.24
Type
journal article
Language
en
Open access
bronze

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