Analyte Conc (pg/ml) Interpretation of combined data     Median Normal AD* CJD* Not int.** Nov11 Aß 42 748 8/28 8/28   12/28 Tau 381         May12 Aß 42 242   29/35   6/35 Tau 459         Nov12 Aß 42 508   29/36 3/36 4/36 Tau 921         May13 Aß 42 978   1/38 29/38 8/38 Tau 3260         Nov13 Aß 42 809 36/39     3/39 Tau 222         *) „Data support the diagnosis of ...”) ** “data combination can not be interpreted”

Table 5: Data combinations of Aß42 and Tau in the CSF surveys Nov11-ov13 together with the differential diagnostic interpretation by the participating laboratories according to the multiple choice criteria: Normal dementia marker, data compatible with AD, data compatible with CJD, data can not be interpreted. Detailed results and explanations are shown in the commentary of the surveys [www.instand-ev.de].

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