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Osteoporosis Health Center

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Black Women's Fracture Risk Lower Than Whites'

Among Older Women, Blacks Have Fewer Fractures Than Whites, Researchers Say
WebMD Health News

May 3, 2005 -- Older black women may have a lower bone-fracture risk than their white peers, even when compared to those who have similar bone density measures.bone density measures.

"Black women have a lower fracture risk at every level of bone mineral density," write Jane Cauley, DrPH, and colleagues in the May 4 issue of The Journal of the American Medical Association.

Bone density and fracture risk are assessed by imaging called a bone mineral density test. The test identifies low bone mineral density, which indicates thin, fragile bones and an increased risk of fracture.thin, fragile bones and an increased risk of fracture.

Low bone mineral density was associated with increased risk of bone fractures in both black and white women, say the researchers. However, they say bone fracture rates were 30% to 40% lower for black women at every level of bone mineral density.

Race-specific databases may be appropriate for defining osteoporosis, write Cauley and colleagues, calling for more studies. A journal editorial agrees that more work is needed on the topic.

Men are also at risk for osteoporosis as they age. This study did not include any men.

Fracture Study

Cauley's study included 7,334 white women aged 67-99 and 636 black women aged 65-94. Their height, weight, and hip bone density were measured.

Every four months for about six years, the women were contacted by letter or phone to ask if they'd had any bone fractures. The study did not include fractures of the spine or those sustained in a major trauma, such as a car crash. Reported fractures were confirmed by X-rays.

Women could report more than one fracture.

A total of 1,712 bone fractures were reported by 1,606 white women. There were 61 bone fractures among 58 black women.

Body weight, height, age, and other factors were also considered. For instance, the researchers noted if the women took calcium supplements, walked for exercise,walked for exercise, used hormones, and drank alcohol.

Those factors have been shown to affect bones. For instance, adequate calcium intake is believed to protect bones, while drinking too much alcohol may sap bone strength. Thin women are also at increased risk of osteoporosis, a condition that can run in families.

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