Combining Lumipulse pTau217 and Aβ42 as confirmatory tests for Aβ pathology prior to DMT

The general performance of the Lumipulse assays was similar across both the ADCC and ITTC, indicating strong repeatability independent of clinical stage. Focusing on only participants eligible for DMTs increased sensitivity and improved accuracy for the Aβ-containing pTau217/Aβ42 ratio and linear combination of markers, and resulted in small numbers of unclassified participants by the test.