Figure 4. Analyzing the serum reaction against human CSN1S1 with respect to formula-fed and breast-fed test persons.

4.1) For each cut-off value, sensitivity and specificity were calculated to choose the optimal cut-off value for the assay which was 0.4. sensitivity; ▪ specificity ▴ 4.2) The 62 probands were divided into two collectives (formula-fed and breast-fed). 25 of the 62 volunteers were formula-fed and 37 were breast-fed. Only 5 sera of the formula-fed collective have an absorption value over 0.4 and 2 sera of the breast-fed collective have an absorption value under 0.4. (dotted line = cut-off value).