According to my dialysis nurse going to 5 or 6 times a week will extend kidney function as you are healthier.
But she's been wrong before.
Ultimately, it comes down to the reason your kidneys failed in the first place. If you have a condition that affects the kidneys, just because you do dialysis does not mean your kidneys will regain function.
Just because you produce urine does not mean your kidneys are functioning. Its the quality that your kidneys filter the toxins.
Doing more dialysis can produce better lab results. Along with doing more days, dialyzing more hours is also better at toxin removal. Longer, slower and more frequent dialysis will produce much better results than shorter treatments whether daily or 3x in center.
///M3R