Good luck to them ... not sure at what stage of the disease its slightly reverse-able (was at stage 3 i think when they caught it for me). I think im in stage 4 now and have been since 2019 ... stage 5 is 90 percent and above.
oops rather its stage 1 .. im at stage 2 CKD but was at stage 3 when initially diagnosed. Stage 4 is 15 to 30 percent function remaining .. 15 percent and below is the last stage.