About the NACC QA/QC process

These links describe how NACC maintains high standards of data quality for all new and existing NACC data, from the way NACC data are collected to the error and alert checks built into the data submission system to catch potential problems before data enter the database. You will also find a link to samples of the QA reports that NACC regularly sends to the Alzheimer's Disease Centers, along with contact information for the NACC QA group.