
Osteopenia
Also called: low bone mass
What it means
Osteopenia means your bone density, as measured by a DEXA scan, is lower than average but not as low as osteoporosis — a T-score between -1.0 and -2.5.
Knowing you have osteopenia is a signal to pay attention to your bone health now, before density potentially declines further toward osteoporosis.
Osteopenia is a term from the DEXA bone density scan. The scan measures how much mineral is packed into your bone and compares it to a healthy young adult, giving you a T-score. If that score falls between -1.0 and -2.5, it's classified as osteopenia — lower bone density than average, but not as low as osteoporosis. A score of -1.0 or above is considered normal, and -2.5 or below is osteoporosis.
It helps to know these cut-offs are statistical conventions used for research and insurance purposes, not hard biological lines. Nothing dramatic happens in your bones between a score of -2.4 and -2.6 — it's a continuum, not a cliff edge. Also keep in mind DEXA gives a two-dimensional reading of your three-dimensional bones, so things like your body size and how you're positioned during the scan can affect the number.
A T-score alone doesn't tell the whole story. Your actual fracture risk also depends on things like age, prior fractures, family history, and other factors — which is why tools like FRAX exist alongside the scan. In fact, someone older with osteopenia and a previous fracture can have a higher real-world risk than someone younger with a lower T-score. If you've been told you have osteopenia, it's worth asking your doctor for your FRAX result too, so you get the fuller picture rather than just one number.
How sure is this?
Graded Established Science: Supported by broad scientific consensus and decades of research. Read each study with its grade in mind. One study is a piece of the picture, not the whole of it.
Where the Academy teaches it
This page is the short version. The lessons teach it in full, with the context around it and a quiz to lock it in.
Questions people ask about this
Osteopenia and osteoporosis are both based on your DEXA T-score, just at different points on the same scale. A T-score between -1.0 and -2.5 is called osteopenia (lower-than-average bone mineral density), while -2.5 or below is called osteoporosis (more significant bone loss). They're not two different diseases — they're a continuum, and the cut-off points are statistical conventions used for research and reimbursement, not a biological cliff where something suddenly changes in your skeleton.
Read the full answer →A T-score compares your bone density to that of a healthy young adult at peak bone mass, and it's the number used to apply the standard categories of normal, osteopenia, or osteoporosis. A Z-score instead compares you to people of your own age and sex, which makes it the more appropriate number for anyone premenopausal, for men under 50, and for children, since a T-score can be misleading in those groups.
Read the full answer →Related words

A DEXA scan is a low-radiation X-ray test that measures how much mineral is in your hip and spine bones, giving you…

A T-score shows how your bone density compares to a healthy young adult, measured in standard deviations, and it's…

Bone mineral density (BMD) measures how much mineral is packed into your bones, usually estimated with a DEXA scan,…

FRAX is a free online tool that calculates your 10-year probability of having a major osteoporotic fracture or hip…

Osteoporosis is a condition where bone breakdown outpaces bone building, causing bones to become thinner, more…
Education only, not medical advice. Decisions about tests, medications and treatment belong with your own doctor. OsteoStrong does not diagnose, treat or cure any disease.


