SUBMIT your abstract or manuscript to NACC for the required review
Before receiving a custom research data set from NACC, researchers must agree to abide by the following rules:
Data files provided by NACC include no variables that would reveal the identity of study subjects (except as noted below). However, files containing individual-level data may contain a variable called NACCID, a random number assigned to each subject by NACC that can be used to distinguish among subjects within the data set and to link data from different visits by the same person.
An investigator may quickly generate and view basic one- and two-way cross-tabulations via this website to obtain aggregate statistics on data sets of interest. Custom cross-tabulations may also be requested through NACC. These may be helpful, for example, to see whether there are enough subjects of a particular type to make a project feasible.