Decreased β-Amyloid 1-42 and Increased Tau Levels in Cerebrospinal Fluid of Patients With Alzheimer Disease

To compare CSF beta-amyloid and tau levels in a new population of AD patients and controls. To perform a meta-analysis of studies of CSF beta-amyloid and tau levels in AD patients and controls.

Cross-sectional study of the comparison of baseline CSF beta-amyloid1-42 and tau levels in AD patients and controls. Meta-analysis involved 17 studies of CSF beta-amyloid and 34 studies of CSF tau.