Baseline and follow-up levels of CSF tau and Aβ42 in the AD patients and age-matched controls.

Values are means±SD except if noted otherwise.apbpAbbreviations: CSF, cerebrospinal fluid; 1-year AD cohort, subjects with Alzheimer's disease with an interval between baseline and follow-up lumbar puncture of approximately one year; 2-year AD cohort, subjects with Alzheimer's disease with an interval between baseline and follow-up lumbar puncture of approximately two years. Controls, healthy controls followed for 4 years.