Heel Ultrasound: May Predict Risk

An ultrasound exam of the heel may be able to predict if a woman is at heightened risk for osteoporosis. Along with certain risk factors, radiation-free ultrasound of the heel may be used to better select women who need further bone density testing. 25/06/2008

Osteoporosis is a disease that is characterized by low bone mass and the deterioration of bone tissue. In the three-year multicenter study, 6,174 women age 70 to 85 with no previous formal diagnosis of osteoporosis were screened with heel-bone quantitative ultrasound (QUS), a diagnostic test used to assess bone density. QUS was used to calculate the stiffness index, which is an indicator of bone strength, at the heel.

Researchers added in risk factors such as age, history of fractures or a recent fall to the results of the heel-bone ultrasound to develop a predictive rule to estimate the risk of fractures. The results showed that 1,464 women (23.7 percent) were considered lower risk and 4,710 (76.3 percent) were considered higher risk.

Study participants were mailed questionnaires every six months for up to 32 months to record any changes in medical conditions, including illness, changes in medications or any fracture. If a fracture had occurred, the patients were asked to specify the fracture's precise location and trauma level and to include a medical report from the physician in charge.

In the group of higher risk women, 290 (6.1 percent) developed fractures whereas only 27 (1.8 percent) of the women in the lower risk group developed fractures. Among the 66 women who developed a hip fracture, 60 (90 percent) were in the higher risk group.

The results show that heel QUS is not only effective at identifying high-risk patients who should receive further testing, but also may be helpful in identifying patients for whom further testing can be avoided.

COMPAMED.de; Source: Radiological Society of North America