I am an 82 year-old pre-diabetic (5.7)woman. I was diagnosed with 3a in 2020 when my eGFR fell to 58, then to 48. I began drinking a lot more water and it rebounded back up. Since then it oscillates between 58-60. eGFR is a calculated number, not an absolute number. It is subject to errors on any single estimate. Over time it is easier to see if it is stable or dropping, especially if the other indices (BUN, creatinine, protein) are higher than they should be.

Nevertheless, I am now monitoring my diet and supplements. I keep a food diary (myfooddiary.com) and am reading and heeding Lee Hull's book 'Stopping Kidney Disease Food Guide'. I think taking your diet seriously and monitoring it is important to slow the progression of this disease. My goal is to maintain my eGFR where it is now.