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Why Norwegian women are twice as likely to fracture a hip as Spanish women

Date:
May 16, 2014
Source:
European Calcified Tissue Society
Summary:
A recent study into causes of bone fractures has been trying to solve a long-standing puzzle: why women in Norway have the highest registered rate of hip fractures in the world, more than double that of women in Spain. Researchers now believe they've hit upon an answer. The investigation showed that the BMS value of Norwegian women was indeed significantly lower than that of Spanish women, by an average of 3.7%. It also showed that Norwegian women had a significantly higher total bone mineral density (BMD) but analysis showed the indentation values did not vary with BMD or age.

A recent study into causes of bone fractures has been trying to solve a long-standing puzzle: why women in Norway have the highest registered rate of hip fractures in the world, more than double that of women in Spain ... and the researchers believe they've hit upon an answer.

The result was presented today in Prague by Daysi Duarte Sosa, of Oslo University Hospital, speaking at the 41st European Calcified Tissue Society Congress, held May 17-20, 2014. Dr Duarte Sosa described how earlier studies had been unable to demonstrate significant differences in bone mass or calcium metabolism between the women of Norway and the women of Spain, and was proposing that the answer might instead lie in the strength of their bone material.

To investigate this, teams from Oslo University Hospital and Hospital del Mar-IMIM of Autonomous University, Barcelona, examined 41 Norwegian and 46 Spanish women, all of whom had normal bone mineral density (BMD) values, no clinical or morphometric vertebral fractures, no detectable signs of secondary osteoporosis and no use of drugs with known influence on bone metabolism. An Osteoprobeฎ device was used to measure microindentation of the thick cortex of the mid tibia (following local anesthesia), with results expressed as BMS (Bone Material Strength) units.

The investigation showed that the BMS value of Norwegian women was indeed significantly lower than that of Spanish women, by an average of 3.7%. It also showed that Norwegian women had a significantly higher total BMD but analysis showed the indentation values did not vary with BMD or age.

Dr Duarte Sosa said of the findings: "It's clear that the quality of bone material in Norwegian women is impaired, in comparison to Spanish women, and this could partly explain why Norwegian women are more likely to have hip fractures than Spanish women."

She added: "This is the first demonstration of ethnical differences in bone material properties."


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The above story is based on materials provided by European Calcified Tissue Society. Note: Materials may be edited for content and length.


Cite This Page:

European Calcified Tissue Society. "Why Norwegian women are twice as likely to fracture a hip as Spanish women." ScienceDaily. ScienceDaily, 16 May 2014. <www.sciencedaily.com/releases/2014/05/140516202953.htm>.
European Calcified Tissue Society. (2014, May 16). Why Norwegian women are twice as likely to fracture a hip as Spanish women. ScienceDaily. Retrieved October 1, 2014 from www.sciencedaily.com/releases/2014/05/140516202953.htm
European Calcified Tissue Society. "Why Norwegian women are twice as likely to fracture a hip as Spanish women." ScienceDaily. www.sciencedaily.com/releases/2014/05/140516202953.htm (accessed October 1, 2014).

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