A sample of ADNI data in long format. This data contains longitudinal follow-up visits from CU and MCI patients, with baseline measures of plasma biomarkers (abeta, p-tau, nfl), CSF biomarkers, MRI measures, cognition, and demographics. Longitudinal outcomes include cognition (MMSE, CDRSB) and conversion to AD dementia and conversion to all-cause dementia. There is also binarized biomarker status for many of the variables.