When this information is known, people with a high risk for bone fracture can be treated with the goal of preventing future fractures. Thus, a person with a BMD of 1 SD below normal (T-score of -1) has twice the risk for bone fracture as a person with a normal BMD. In general, the risk for bone fracture doubles with every SD below normal. ![]() Positive T-scores indicate the bone is stronger than normal negative T-scores indicate the bone is weaker than normal.Īccording to the World Health Organization, osteoporosis is defined based on the following bone density levels:Ī T-score within 1 SD (+1 or -1) of the young adult mean indicates normal bone density.Ī T-score of 1 to 2.5 SD below the young adult mean (-1 to -2.5 SD) indicates low bone mass.Ī T-score of 2.5 SD or more below the young adult mean (more than -2.5 SD) indicates the presence of osteoporosis. The standard deviation (SD) is the difference between your BMD and that of the healthy young adults. Your BMD is compared to 2 norms-healthy young adults (your T-score) and age-matched adults (your Z-score).įirst, your BMD result is compared with the BMD results from healthy 25- to 35-year-old adults of your same sex and ethnicity. Strength at a much earlier stage when treatment can be beneficial.Ī bone density test determines the bone mineral density (BMD). Bone densitometry testing can find decreasing bone density and Weakness can be seen on standard X-rays, it may be too far advanced to Precise as the nonportable methods because only one bone site is tested. Of the lower arm), wrist, fingers, or heel for testing, but is not as Portable testing may use the radius (1 of the 2 bones Procedure typically measures the bone density of the bones of the spine, It is also used to determine your future fracture risk. This is a condition in which bones are more brittle and prone toĪ bone density test is used mainly to diagnose osteopenia and This measurement tells the healthcare provider whether there is decreasedīone mass. For various reasons, the DEXA scan is considered the Or a special CT scan that uses computer software to determine bone density May be done using X-rays, dual-energy X-ray absorptiometry (DEXA or DXA), (where there is a focal abnormality, e.g.A bone density test is used to measure bone mineral content and density. scores in the lumbar spine can be increased in the setting of degenerative sclerotic change, ankylosing spondylitis, osteoporotic spinal compression fracture, etc.insufficient internal rotation of the femur) measured bone mineral density ![]() ![]()
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