I was on high doeses of prednisione for years and years on and off (more on than off tho). 60mg as well. From about age 8 to 18. Pills daily, and for a while I had a PICC line at home and it was being given IV. This was in my young years when I was developing. I was also getting it IV in the many many visits long term to the hospital.
I'm happy to say, as it seems, I have had no long term effects from it. Im 30 now. I frequent the gym, I do some crazy strength trianing when I'm feeling froggy, do warrior dashes and other obstacle marathon races, have seen not one problem with any part of me as a result of long term prednisione use. Bones work great, strong, no organ issues that have presented themselves or joint problems (I can't tell you how thankful I am for that)
During the time I was on it I had horrible side effects. Terrible puffiness and acne that made middle school very difficult for me because the kids were so mean, terrible joint pain, it was rough. I should post a before and after picture, you wouldn't believe how different it made me look.
Hopefully your husband wont have any long term effects either. prednisione is a life saver for many reasons but it's a killer for many others. Good luck!!!