Having a bone density test is important so that you will know if you have normal bone density, low bone density, or osteoporosis. Knowing your bone density is the only way osteoporosis can be diagnosed. If you have a lower bone density, there is a higher risk of sustaining a fracture.
When you have a bone density test, your result comes back as a “T-score.” Osteoporosis -3 means you need to take steps to boost your bone strength. http://universityhealthnews.com/daily/bones-joints/osteoporosis-3-what-your-t-score-means-for-your-bone-health/
Osteoporosis......A Silent Disease. Osteoporosis is a disease where a person has a very low bone mass & density and the chances of getting fractures are very high causing acute pain. What a Bone Mass Density(BMD) Test Can Do? - A Bone Mass Density Test tells you if you have normal bone density or low bone density (which can be osteopenia or osteoporosis). IT IS THE ONLY TEST THAT CAN DIAGNOSE OSTEOPOROSIS. The lower your bone density, the greater your risk of breaking a bone.
Testing: What Your T-Score Means Testing compares your bone mineral density (BMD) with that of a healthy 30-year-old, since that's when bone mass is at its peak. The results come as a T-score in these ranges: -1.0 and higher is normal bone density Between -1.0 and -2.5 shows low bone density (osteopenia) but not osteoporosis -2.5 or below indicates osteoporosis As your bone density decreases, your T-score gets lower.