The invention relates to a method for normalizing, storing and/or displaying curves describing the adequacy of a kidney substitution treatment wherein the treatment is provided by a machine which has an extracorporeal blood system (31, 32) pumping the patient's blood at a preset flow rate through the blood chamber (30) of a dialyzer which is divided by a semi-permeable membrane into the blood chamber (30) and a dialyzing fluid chamber (29), and wherein the dialyzing fluid flows at a preset flow rate through the dialyzing fluid system (20, 36) of the machine and collects the waste products from the patient, and wherein a device (37) capable of continuously measuring any treatment related waste product is provided to deliver together with the data provided by the treatment machine an adequacy parameter, wherein curves describing the adequacy of the treatment are normalized to make them comparable, and/or stored in an adequate media and/or displayed on the user interface of the machine and wherein means are available to calculate parameters quantifying the adequacy differences between treatments.
