Osteopenia and osteoporosis explained

These two words come up a lot and they worry people more than they need to, usually because they sound like two separate diseases. They are better understood as points along one line. Bone strength runs from healthy, through a middle stretch where it has thinned somewhat, to a point where it has thinned enough that a fall is more likely to break something.

Osteopenia is the middle stretch. It is closer to a early notice than a diagnosis of illness: bone is not as strong as it once was, and that is worth knowing, but plenty of people with it never go on to develop anything more serious. Osteoporosis is further along the same line, where bone has become fragile enough that a modest fall could cause a fracture, most often at the hip, spine or wrist.

Two things are worth holding on to. The first is that where you sit on that line is decided by your doctor, using a scan and the whole picture of your health, not by anything you can read on a website. The second is that neither word means there is nothing to be done. Both ends of the problem can be worked on: the strength of the bone, and the likelihood of the fall that would test it.

That second half is often overlooked and it is the part most within reach. Stronger legs, steadier balance, good light on the stairs, sensible shoes and a clear floor all reduce the chance of falling in the first place. This page is for understanding the words, not for diagnosing yourself, and any decision about tests or treatment belongs with your doctor.