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Vitamin B-12 status is associated with bone mineral content and bone mineral density in frail elderly women but not in men

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Author: Dhonukshe-Rutten, R.A.M. · Lips, M. · Jong, N. de · Marijke, J.M.C.A.P. · Hiddink, G.J. · Dusseldorp, M. van · Groot, L.C.P.G.M. de · Staveren, W.A. van
Type:article
Date:2003
Institution: Centraal Instituut voor Voedingsonderzoek TNO TNO Voeding
Source:Journal of Nutrition, 3, 133, 801-807
Identifier: 236992
Keywords: Nutrition Health · Food and Chemical Risk Analysis · Cobalamin · Logistic analysis · Multiple regression analysis · Osteoporosis · 25 hydroxyvitamin D · Cyanocobalamin · Homocysteine · Methylmalonic acid · Parathyroid hormone · Aged · Aging · Bone density · Bone mineral · Caloric intake · Controlled study · Cyanocobalamin deficiency · Dual energy X ray absorptiometry · Female · Male · Netherlands · Nutritional status · Osteoporosis · Vitamin blood level · Aged · Aged, 80 and over · Body Composition · Body Height · Body Weight · Bone Density · Calcium, Dietary · Densitometry, X-Ray · Frail Elderly · Homocysteine · Humans · Methylmalonic Acid · Netherlands · Nutritional Status · Odds Ratio · Osteoporosis · Parathyroid Hormone · Regression Analysis · Sex Characteristics · Smoking · Vitamin B 12 · Vitamin B 12 Deficiency · Vitamin D

Abstract

Subclinical vitamin B-12 deficiency is common in the elderly. Encouraged by early indications, we investigated the plasma vitamin B-12 status in association with bone mineral content (BMC) and bone mineral density (BMD) in frail elderly people. Data of 194 free-living Dutch frail elderly (143 women and 51 men) were available. BMC and BMD were measured by dual energy X-ray analysis. Biochemical analyses were performed on plasma or serum including vitamin B-12, methylmalonic acid, homocysteine, 25-hydroxy vitamin D and parathyroid hormone. Women had higher plasma vitamin B-12 (288 and 238 pmol/L, respectively) and lower plasma homocysteine levels (15.8 and 21.3 μmol/L, respectively) than men. Of the total explained variance of BMC and BMD in women (46 and 22%, respectively), 1.3-3.1% was explained by plasma vitamin B-12, in addition to weight and height or energy intake. In men, the variance of BMC and BMD was explained by weight, smoking and/or height (total R2 was 53 and 25%, respectively), but not by plasma vitamin B-12. Osteoporosis occurred more often among women whose vitamin B-12 status was considered marginal or deficient than in women with a normal status, i.e., the prevalence odds ratios (after adjustment for weight, age and calcium intake) (95% confidence intervals) were 4.5 (0.8; 24.8) and 6.9 (1.2;39.4), respectively. These results suggest that vitamin B-12 status is associated with bone health in elderly women. Future studies on bone health should take into account a possible role of vitamin B-12 status in different populations. Chemicals/CAS: 25 hydroxyvitamin D, 64719-49-9; cyanocobalamin, 53570-76-6, 68-19-9, 8064-09-3; homocysteine, 454-28-4, 6027-13-0; methylmalonic acid, 516-05-2; parathyroid hormone, 12584-96-2, 68893-82-3, 9002-64-6; 25-hydroxyvitamin D, 64719-49-9; Calcium, Dietary; Homocysteine, 454-28-4; Methylmalonic Acid, 516-05-2; Parathyroid Hormone; Vitamin B 12, 68-19-9; Vitamin D, 1406-16-2