MAPT and Alzheimer disease: When assessing the diagnostic accuracy of Lumipulse CSF Aβ and tau in classifying clinical AD from cognitively asymptomatic controls, Lumipulse ratios of Aβ42/Aβ40, Aβ42/t‐tau, and Aβ42/p‐tau181 were found to have a higher diagnostic accuracy than individual markers.20, 21