I honestly don't know what the cause of my CKD. I have a few ideas, but the docs have never confirmed my suspiscions. When I was diagnosed in 1982 we had just came home from a vacation to the Grand Canyon and we had hiked to Plateau Point, it was a grueling all day hike. After that I developed severe pitting edema, many tests and doctor visits and after a bioposy I was finally diagnosed with membraneous glomerilu nephritos (sorry for the spelling ) I was told to stay away from Advil and other than that not much concern until my GFR dropped to under 20. My last blood test was GFR of 13....ugh. When did you have to go on dialysis...what was your numbers? I see your sister donated a kidney, how is that going for the two of you? Joanna