If your doctor has recommended a bone density scan, or you already have your results and are staring at unfamiliar terms like T-score and Z-score, this guide is here to make sense of it. A bone density scan is one of the most useful, painless tests available for understanding your bone health, particularly relevant in perimenopause, when bone loss accelerates. Understanding your results helps you have a more informed conversation with your doctor and take the right next steps.
What a DEXA Scan Actually Is
DEXA stands for Dual-Energy X-ray Absorptiometry. It is a low-radiation scan, quick and painless, that measures the density of your bones, most commonly at the hip and spine, the areas most relevant to fracture risk. It is considered the gold standard test for assessing bone density and diagnosing osteoporosis before a fracture happens, which is exactly its value: catching bone loss while it can still be addressed.
Understanding Your T-Score
Your results will typically include a T-score, which compares your bone density to that of a healthy young adult at peak bone density. This is the number that matters most for interpreting your results:
A T-score of -1.0 or above is considered normal bone density.
A T-score between -1.0 and -2.5 indicates osteopenia, meaning bone density is lower than normal but not yet at the level defined as osteoporosis. This is a meaningful signal to act, not a diagnosis to be alarmed by, since osteopenia is very manageable with the right steps.
A T-score of -2.5 or below indicates osteoporosis, meaning bone density is significantly reduced and fracture risk is higher. This is also very much a manageable, treatable finding, not a cause for despair, particularly when identified proactively through screening rather than after a fracture.
What About the Z-Score?
You may also see a Z-score, which compares your bone density to other people of your own age, sex, and body size, rather than to a young adult at peak density. This offers useful additional context, particularly for younger women, and can help your doctor consider whether something beyond typical age-related change might be contributing to lower bone density.
Why This Matters So Much in Perimenopause
As covered in our guide to preparing your bones for perimenopause, falling oestrogen accelerates bone loss significantly around this life stage, often before it is felt or noticed in any other way. A DEXA scan is valuable precisely because bone loss is silent, there are no symptoms until a fracture occurs, so this test gives you and your doctor real information to act on well before that point.
Who Should Consider a Scan
A DEXA scan is worth discussing with your doctor if you have risk factors such as a family history of osteoporosis or hip fracture, early or premature menopause, a naturally small or thin body frame, a history of being significantly underweight or of disordered eating, long-term steroid medication use, a previous fracture from a minor fall, or if you are simply moving through perimenopause and want a proactive baseline. Your doctor can advise on the right timing for you specifically.
What to Do With Your Results
If your result is normal, continue the good habits, weight-bearing and strength exercise, adequate calcium and protein, vitamin D, and avoiding smoking and excess alcohol, that protect bone density going forward, and ask your doctor when it makes sense to repeat the scan.
If your result shows osteopenia, this is a genuinely important window to act. Weight-bearing and resistance exercise, adequate calcium and vitamin D, and lifestyle changes can meaningfully slow or even improve bone density from this stage. Your doctor may also discuss whether HRT is appropriate for you, since it is one of the most effective treatments for preventing further bone loss.
If your result shows osteoporosis, your doctor will discuss a fuller treatment plan, which may include specific bone-strengthening medications alongside lifestyle measures, tailored to your individual risk and health profile. This is a very manageable diagnosis with the right approach, and getting it identified through screening, rather than after a fracture, is a genuine win.
When to See a Doctor
Routine appointment to discuss whether a DEXA scan is appropriate for you, given your age, risk factors, and where you are in perimenopause, or to go through your results in detail if you already have them and have questions.
Promptly if you experience a fracture from a minor fall or bump, notice a loss of height, or develop a new stoop in your upper back, as these can indicate bone loss has already progressed and warrant assessment.
A DEXA scan turns invisible bone loss into a clear, actionable number. Whatever your T-score shows, it is information you can use, with your doctor, to protect your bones for the decades ahead, and that is exactly the point of getting it done.
The Second Spring is an information resource, not a medical provider. For personal advice, speak with your doctor or gynaecologist. Write to us at thesecondspringofficial@gmail.com
