Form B1a Submission (UDSv3)
Introduction
Alzheimer’s Disease Research Centers (ADRCs) can submit B1a Evaluation Form — Blood Pressure Addendum for UDSv3 visits to NACC through the ADRC Portal. B1a submission follows different entry points and rules than the UDSv4 data streams currently accepted in the Portal.
Submission Instructions
Submission instructions are similar to the Down Syndrome Module submission instructions for UDSv3. Any notable differences are mentioned below.
File requirements
- B1a submissions require a specific filename suffix
-b1a.csv. - The CSV column headers should match with the Data Element Dictionary for the B1a Form which can be found in the EDC File Downloads Page.
Mapping the B1a Form to the UDSv3 packet
- PTID, VISITNUM, and VISITDATE of the B1a form should exactly match those of the respective UDSv3 packet.
Even when the visit is split into multiple days, the same VISITNUM and VISITDATE MUST be used for the header variables in both submissions (UDS and Form B1a). Guidance is to use the date that UDS Form A1 is filled as the VISITDATE for both. Individual form dates (FRMDATE[XX] variables) can be different depdending on when they are completed.
- PACKET code
For a B1a form collected for a UDSv3 IVP (packet code I or IT), use PACKET=I. For a B1a form collected for a UDSv3 FVP (packet code F or T), use PACKET=F.
NACC-hosted REDCap Direct Entry option is NOT supported for UDSv3 B1a Form submissions.