Decision to Delay Prolia

A year ago I had my first Dexa scan which showed a -2.5 score in my lower spine, osteopenia in other areas. I had a wrist fracture 3 months earlier, so the recommendation was to start treatment. Given that I have stage 3a CKD, Prolia was the recommended option by my PCP. I had one injection on 7/31 but decided to consult a specialist before continuing with Prolia as scheduled this past January following further research about side effects, etc. The rheumatologist recommended I continue Prolia but did agree to do another Dexa, a skeletal X-ray and blood tests. The Dexa came back showing improvement in all areas including a -2.3 in my lower spine. My questions to this group - can one injection of Prolia, given 8 months ago, account for this improvement?

I do believe my second scan was more thorough and done by a better technician (first one did not adjust my positioning during the scan and seemed inexperienced), and I had increased my weight bearing exercise and diet.

I am an otherwise healthy and active 65 year old women and am concerned about taking Prolia at my relatively young and and am inclined to wait a year and get another scan to reassess. I have a follow up with my Dr. but would greatly appreciate any feedback from this very helpful group. Many thanks!