[ Question : Does pee equal Kidney function!? ]
No it does not and nephrologists always "look out" for quality-urine-output for that reason.
For example, I have been on dialysis for a few years now and I still have some output every day, but I am no longer producing any "quality output" because my "two little fighters" are no longer able to filter properly and that is the reason why I need dialysis. But nevertheless, I am very happy to still be able and have some output, because without it, I daresay, I would have to face different problems ...
Best wishes from Kristina.