"Borderline osteopenia" - if the hip t-score had been -1.0 instead of -1.1 it would have been normal!! The femoral neck - which is the bit they usually worry about - is perfectly normal, as if you were in your 30s! Anybody would be delighted to have those results and you do NOT need any bone protection medications except maybe calcium anc vit D to keep the readings where they are despite pred which can deplete both.
I wouldn't be taking any more AA with current results like that. They are as near normal as matters and an ideal time to take a drug holiday from the AA which is recommended every few years at least.
Osteopenia isn't a pathological term. all it means is that your bone density is lower than the peak. The t-scores are indicators of where on the scale you lie and as DL has said, -1,0 is the borderline between normal and osteopenia but it then runs to -2,5 before it turns to the term osteoporosis. And even that is just a number plucked out of thin air where they decided it was time to be concerned. Most people who fracture bones have a normal bone density!
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