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Daksha P Trivedi a Clinical Gerontology Unit, University of Cambridge
School of Clinical Medicine, Addenbrooke's Hospital, Cambridge
CB2 2QQ, b Clinical Trial Service Unit and Epidemiological Studies Unit,
University of Oxford
Correspondence to: K T
Khaw kk101{at}medschl.cam.ac.uk
Objective:
To determine the effect of four monthly
vitamin D supplementation on the rate of fractures in men and women
aged 65 years and over living in the community.
What is already known in this topic
Whether isolated vitamin D supplementation prevents fractures is not
clear What this paper adds
Total fracture incidence was reduced by 22% and fractures in major
osteoporotic sites by 33%
Design:
Randomised double blind controlled trial of 100 000 IU oral vitamin D3 (cholecalciferol)
supplementation or matching placebo every four months over five years.
Setting and participants:
2686 people (2037 men and
649 women) aged 65-85 years living in the general community, recruited
from the British doctors register and a general practice register in Suffolk.
Main outcome measures:
Fracture incidence and total
mortality by cause.
Results:
After five years 268 men and women had
incident fractures, of whom 147 had fractures in common osteoporotic
sites (hip, wrist or forearm, or vertebrae). Relative risks in the
vitamin D group compared with the placebo group were 0.78 (95%
confidence interval 0.61 to 0.99, P=0.04) for any first fracture and
0.67 (0.48 to 0.93, P=0.02) for first hip, wrist or forearm, or
vertebral fracture. 471 participants died. The relative risk for total
mortality in the vitamin D group compared with the placebo group was
0.88 (0.74 to 1.06, P=0.18). Findings were consistent in men and
women and in doctors and the general practice population.
Conclusion:
Four monthly supplementation with
100 000 IU oral vitamin D may prevent fractures without adverse
effects in men and women living in the general community.
Vitamin D and calcium supplements are effective in preventing fractures
in elderly women
Four monthly oral supplementation with 100 000 IU vitamin D
reduces fractures in men and women aged over 65 living in the general
community
Read all Rapid Responses
What can you learn from this BMJ paper? Read Leanne Tite's Paper+