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Value Of Drugs For Pre-osteoporosis Exaggerated, Experts Warn

Date:
January 20, 2008
Source:
BMJ-British Medical Journal
Summary:
A series of recent scientific publications have exaggerated the benefits and underplayed the harms of drugs to treat pre-osteoporosis or "osteopenia" potentially encouraging treatment in millions of low risk women, warn experts.

A series of recent scientific publications have exaggerated the benefits and underplayed the harms of drugs to treat pre-osteoporosis or "osteopenia" potentially encouraging treatment in millions of low risk women, warn experts in the British Medical Journal.

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The authors believe that this represents a classic case of disease-mongering: a risk factor being transformed into a medical disease in order to sell tests and drugs to relatively healthy people.

Osteopenia or "pre-osteoporosis" is said to affect around half of all older women and, in at least one country, drug companies have already begun to market their drugs to women with osteopenia, based on re-analyses of four osteoporosis drug trials.

But the authors of this week's BMJ paper argue that this move raises serious questions about the benefit-risk ratio for low risk individuals, and about the costs of medicalising and potentially treating an enormous group of healthy people.

These reanalyses tend to exaggerate the benefits of drug therapy, they say. For example, the authors of one reanalysis cite a 75% relative risk reduction, though this translates into only a 0.9% reduction in absolute risk.

In other words, up to 270 women with pre-osteoporosis might need to be treated with drugs for three years so that one of them could avoid a single vertebral fracture.

Most of the reanalyses also play down the harms of drug therapy, they add. For example, the reanalysis of data for the drug raloxifene focuses solely on the potential benefits, with no mention of an increased risk of blood clots.

Finally, like much of the published literature on osteoporosis, these analyses have potential conflicts of interest, they write. For instance, all of the original drug trials being re-analysed were funded by industry and, in three out of four cases, drug company employees were part of the team conducting the reanalyses.

The World Health Organisation is currently developing guidance on how to deal with women categorised as having osteopenia. Whether this will stop industry efforts to encourage treatment in low risk women is, however, questionable, they say.

"We need to ask whether the coming wave of marketing targeting those women with pre-osteoporosis will result in the sound effective prevention of fractures or the unnecessary and wasteful treatment of millions more healthy women," they conclude.


Story Source:

The above story is based on materials provided by BMJ-British Medical Journal. Note: Materials may be edited for content and length.


Cite This Page:

BMJ-British Medical Journal. "Value Of Drugs For Pre-osteoporosis Exaggerated, Experts Warn." ScienceDaily. ScienceDaily, 20 January 2008. <www.sciencedaily.com/releases/2008/01/080118093608.htm>.
BMJ-British Medical Journal. (2008, January 20). Value Of Drugs For Pre-osteoporosis Exaggerated, Experts Warn. ScienceDaily. Retrieved December 20, 2014 from www.sciencedaily.com/releases/2008/01/080118093608.htm
BMJ-British Medical Journal. "Value Of Drugs For Pre-osteoporosis Exaggerated, Experts Warn." ScienceDaily. www.sciencedaily.com/releases/2008/01/080118093608.htm (accessed December 20, 2014).

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