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Garvan Insitute scientists suggest new approach for treating patients with brittle bones

Scientists from the Garvan Institute of Medical Research in Sydney, Australia, are suggesting a new approach to determining the risk of fracture in individuals with the brittle bone disease, osteoporosis, which could have treatment implications. Their finding, published in the Journal of Bone and Mineral Research, is based on data from a fifteen-year epidemiology study and shows that calculating bone loss, by having at least two bone mineral density (BMD) measurements taken a minimum of 1-2 years apart, can improve the accuracy of fracture risk assessment.

Currently a bone density (DXA) scan is used to diagnose osteoporosis but, in Australia, treatment is usually only prescribed when an individual has had a fracture - regardless of BMD levels. Individuals with low BMD, despite being at high risk of fractures, are not commonly considered for drug treatment even though experts suggest that they should have preventative medication.

One in two women and one in three men over the age of 60 will have a fracture due to osteoporosis* and, with an ageing population, the total numbers of sufferers is increasing. Fractures are a major cause of pain, disability and premature death.

There are medicines available to treat those with brittle bones. Many clinical trials have shown that a drug that moderately increases BMD (e.g. by 3 to 4%) can reduce fracture risk by as much as half. The cost of measuring BMD by a DXA scan is relatively small, but the cost of treatment - if all individuals with low BMD are treated - is significant at the population level. The cost/benefit of mass screening of osteoporosis has been debated in Australia for some time and the issue boils down to how much money should be spent to prevent one fracture.

Associate Professor Tuan Nguyen, who is a joint head of the Epidemiology group of the Bone and Mineral Research Program at the Garvan Institute, says: "We know that low bone mineral density is the most important ri
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Contact: Branwen Morgan
b.morgan@garvan.org.au
44-779-224-5247
Research Australia
29-Aug-2005


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