The Bocx, you posted this paragraph: "So that you understand what this means, if a group of normal people have very different amounts of RECAF in blood, then you need a high cutoff value in order to eliminate all (or 95%) of the normals. However, if the value is very different from one individual to another but the value is pretty constant for that individual, then you do not use the average of all normal people, you use the average value for that person."
My comment: Do you realize that in the above quoted paragraph, you admit that normal people can have very different amounts of RECAf in their blood and also that the amount of RECAF in the blood of one individual can be "pretty constant." There is certainly a difference between "pretty constant" and constant. Also, if the average RECAF value for a person is used for that person, you have admitted the need to personalize RECAF in some persons. kag
