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Some clients come to me wondering about the difference between osteopenia and osteoporosis. Often, they have just been told that their “diagnosis” of osteopenia means they need bone drugs to prevent a life-altering fracture.
I’m not surprised by their confusion, because most physicians are just as confused when it comes to fracture risk. But the evidence is clear: osteoporosis and osteopenia are not the same thing, and their risk of fractures is not the same either.
Here is the difference osteopenia and osteoporosis, in a nutshell:
Osteoporosis suggests a disease process; osteopenia is a description of lowered bone density.
When you have a diagnosis of osteoporosis, it means you have an actual disorder that can be seen under a microscope. The word “osteoporosis” means “porous bone,” and a close look at the bones of someone with osteoporosis shows the bones are more like Swiss cheese than the spongy appearance of healthy bone.
Osteoporosis is not a normal response to aging, but is indicative of long-term imbalances which culminate in a bone weakening disease process.
Osteopenia, on the other hand, is not a diagnosis. It’s a description. This is a key difference between osteopenia and osteoporosis. The word “osteopenia” means “low bone mass”—and all it’s really doing is stating an observation that your bone mass is lower than that of a woman in her late 20s—someone at the peak of their bone-building and strength.
I’m always tempted to roll my eyes and say “Well, of course!” — because just as you might expect a 55-year-old woman’s hair to be a little grayer than a 25-year-old’s, it’s realistic to expect her bones wouldn’t be as dense as those of a woman 30 years younger.
Osteoporosis warrants an extensive work-up looking for causes of excessive bone loss. Osteopenia may or may not be an early warning sign of bone weakening and generally does not trigger the need for a work-up or conventional medical treatment — with some exceptions.
Osteopenia, however, is not a diagnosis nor a disease and often, in fact, is the result of statistics. Because bone density testing “T scores” represent a statistical calculation — by statistical definition, 15% of healthy young people will be told they have osteopenia. Most often these are small boned, light weight individuals. In these cases having “osteopenia” is simply a product of an individual’s general body type and more a statistical artifact testing bias than anything to do with their actual bone health.
When is osteopenia something to take seriously?
Since women’s peak bone mass occurs in their late 20s, it stands to reason that some amount of bone loss takes place throughout the subsequent decades. Whether or not slipping into “osteopenic” bone density range is a serious concern depends on the individual case. This is where we find the proverbial devil hiding in the details. Here’s how this goes…
At the Center for Better Bones, our developing clinical findings have discovered different “types” of osteopenia — some being more troublesome than others. I will be detailing these clinical findings in our upcoming online course, Moving Beyond Osteopenia. For now let me mention a few key factors that distinguish a harmless finding of osteopenia from one that may well signal serious bone weakening:
- Finding “osteopenia” in a bone scan becomes concerning if subsequent scans reveal rapid and excessive bone loss, such as more than 2% a year loss during the menopause transition, and more than .05 to 1 % a year loss from 5 years after menopause and onwards. On-going excessive bone loss signals that one is on the road to osteoporosis.
- Osteopenia found in those whose parent(s) have fractured a hip fracture could be an early red flag of future bone fragility. It warrants follow-up to find out whether this individual herself is losing bone, and if so, how rapid is the loss.
- Entering menopause with osteopenia is a concern as the average woman loses 10% of her bone mass between the first few years before and the first five years after her last period. Some women lose up to 20% in this transition. Starting the menopause transition with lower than normal bone mass signals the need for a life-supporting, bone-preseving program.
- Anyone with osteopenia who has experienced a low-trauma fracture has documented bone weakness and would do well to take their “osteopenia” seriously by implementing a bone building lifestyle and nutrition program.
To conclude, let me say that the limitations of bone density testing are now clear. Amongst other things, it is now obvious you cannot foretell fracture by bone density alone. Many women with normal or near normal bone mass experience fracture. If you’re concerned about osteopenia and interested in taking charge of your bone health, I invite you to join me in my upcoming online course, Moving Beyond Osteopenia: An Empowered Woman’s Course on Demystifying Her Diagnosis.
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