I say Hooray for the 97%!!! Bless them for they will have to deal with other struggles. From what I have been able to determine, any disease that affects 3-5% of the population will co-exist with many other conditions. The study you cite, Amy, seems to say that when they looked at large numbers, only a relatively small number of conditions could not be explained away by mere coincidence, notably fractures and blood clots (not exactly small change to be sure).
Regarding the treatment of MGUS, what I have been told is that most hem-oncs believe that not only has it not been proven to help, agressively treating at this stage may actually adversely affect us if/when we actually need it. Sort of like bringing out the "big guns" now may actaully shoot us in the foot in the unfortunate and unlikely (approx 1% per year risk) probability we may convert from MGUS to MM. It is not like removing a small skin lesion to prevent malignant melanoma, or snipping polyps to prevent colon cancer.
I don't know, I am merely a student of all of this. So for me now, until convinced otherwise, it is regular follow-up, low dose aspirin, healthy diet, exercise, meditation, calcium, Vit D and C and curcumin. I will NOT let this rule my life, stressing out between labs, bone marrow biopsies and x-rays . I am also in a MGUS study at my cancer center.
Love and Luck to all on this board!
NanLiz