This study was supported by TEVA Pharmaceuticals Industries Ltd., Israel, and University Hospital, Basel, Switzerland.
Alfacalcidol Reduces the Number of Fallers in a Community-Dwelling Elderly Population with a Minimum Calcium Intake of More Than 500 Mg Daily
Article first published online: 22 JAN 2004
Journal of the American Geriatrics Society
Volume 52, Issue 2, pages 230–236, February 2004
How to Cite
Dukas, L., Bischoff, H. A., Lindpaintner, L. S., Schacht, E., Birkner-binder, D., Damm, T. N., Thalmann, B. and Stähelin, H. B. (2004), Alfacalcidol Reduces the Number of Fallers in a Community-Dwelling Elderly Population with a Minimum Calcium Intake of More Than 500 Mg Daily. Journal of the American Geriatrics Society, 52: 230–236. doi: 10.1111/j.1532-5415.2004.52060.x
- Issue published online: 22 JAN 2004
- Article first published online: 22 JAN 2004
Objectives: To study the effect of alfacalcidol (1α(OH)D3) on fall risk in community-dwelling elderly men and women.
Design: Randomized, double-blind, placebo-controlled intervention trial.
Setting: Basel, Switzerland.
Participants: Three hundred seventy-eight community-dwelling elderly (191 women/187 men).
Intervention: Participants were randomly assigned to receive 1 μg of alfacalcidol or matched placebo daily for 36 weeks.
Measurements: Serum 25-hydoxyvitamin D3 (25(OH) D,1,25-dihydroxyvitamin D3 (D-hormone), and intact parathormone (iPTH) levels were measured using radioimmunoassay at baseline and every 12 weeks. Numbers of fallers and falls were assessed using a questionnaire during each study site visit. Dietary calcium intake was assessed at baseline using a food frequency questionnaire.
Results: At baseline, participants had, on average, normal vitamin D and D-hormone serum levels. Over 36 weeks, alfacalcidol treatment was associated with fewer fallers (odds ratio (OR)=0.69, 95% confidence interval (CI)=0.41–1.16) than placebo. In a post hoc subgroups analysis by medians of total calcium intake, this reduction reached significance in alfacalcidol-treated subjects with a total calcium intake of more than 512 mg/d (OR=0.45, 95% CI=0.21–0.97, P=.042) but not in those who consumed less than 512 mg/d (OR=1.00, 95% CI= 0.47–2.11, P=.998). Alfacalcidol treatment was also, independent of total calcium intake, associated with a significant 37.9% reduction in iPTH serum levels (P<.0001). No cases of clinically relevant hypercalcemia were observed.
Conclusion: Provided a minimal calcium intake of more than 512 mg/d, alfacalcidol treatment significantly and safely reduces number of fallers in an elderly community dwelling population.