I have had both DEXA and REMS tests. My DEXA results show osteopenia but I broke 5 bones in 18 months. My REMS results were in the Osteoporosis range, which I believe with my fracture history to be more reliable. The DEXA is influenced by arthritis, fractures, poor positioning and does not have a fragility score unless TBS is connected. In addition, DEXA uses radiation, while REMS is just an ultrasound so has no possible negative side effects.