About 18 million Americans have osteopenia. Osteopenia refers to early signs of bone loss that can turn into osteoporosis. With osteopenia, bone mineral density is lower than normal. However, it is not yet low enough to be considered osteoporosis.
Not everyone who has osteopenia develops osteoporosis. But osteopenia can turn into osteoporosis. Osteoporosis can result in easily fractured bones and other very serious bone problems. It can also cause disfigurement and lead to loss of mobility and independence.
Your bones are alive and constantly growing -- not static, like you see them drawn in books. Bones continually change throughout your life, with some bone cells dissolving and new bone cells growing back in a process called remodeling. With this lifelong turnover of bone cells, you replace most of your skeleton every 10 years.
But for people with osteoporosis -- a thinning of the bones -- bone loss outpaces the growth of new bone. Bones become porous, brittle, and prone to fracture. Look at an...
Bone health is measured in two ways. The first is bone density. Bone density defines the thickness of your bone. The second is bone mass. Bone mass means how much bone you have. Bone mass, or the amount of bone you have, usually peaks around age 30. Then bone mass begins to decline. Your body starts to reabsorb bone faster than new bone can be made.
To find bone density, your health care provider measures the levels of minerals in your bones. These minerals include:
The denser the content of your bone mineral is, the stronger your bones are.
With aging, your body absorbs back calcium and other minerals from your bones. This reabsorption can make your bones weaker and lead to osteopenia and osteoporosis. The bones become more vulnerable to fractures and other damage.
What Are Some Risk Factors for Osteopenia and Osteoporosis?
Risk factors for developing osteopenia are the same as those for developing osteoporosis. They include:
How Can my Doctor Test for Osteopenia and Osteoporosis?
The most accurate way to diagnose osteopenia and osteoporosis is through bone mineral density testing. This is usually done with a dual-energy X-ray absorptiometry (DXA) scan.
DXA scan results are reported as T-scores:
Normal bone: T-score above -1
Osteopenia: T-score between -1 and -2.5
Osteoporosis: T-score of -2.5 or lower
Other tests can be done to help diagnose osteoporosis and osteopenia. Quantitative ultrasound is one such test. It measures the speed of sound in the bone to assess bone density and strength. DXA scans are usually still needed to confirm results from ultrasound and other tests.