Question

Question Posted 10/04/16:
I would like to download MRI scans of Healthy Controls in the ADNI database. In the advanced search tool I specifically asked for ADNI 1 (being the only dataset having controls) and "Normals". I could download 230 subjects. I then downlaoded the Demographic Info .cvs file. The problem is that I cannot find the Normal subject in this demographic info file. For example the first Normal subject in the list that I have downloaded is the 002_S_0295. Can you tell me how to retrieve information about this subject? Which is his/her ID number, 0295 or 002?

In particular, I searched for normals under the classification "PATIENTS"and not "VOLUNTEERS". Is it ok?

I am looking forward to hearing from you,
Kind Regards
Marco Ganzetti, PhD
Response posted 10/04/16 by Danielle:
All phases of ADNI have healthy controls (ADNI-GO continued to follow healthy controls from ADNI-1 and there were newly recruited healthy controls in ADNI-2, in addition to continuing to follow those from ADNI-1 and ADNI-GO), so if you are interested in normals, you shouldn't restrict your search to just ADNI-1.

To help link demographics or other clinical/neuropsych/biomarker/imaging summary data to individuals for whom you have downloaded images, use the ROSTER.csv file - this links RID (participant roster identifier) to the PTID (XXX_S_XXXX) - note, the last 4 digits of PTID is the RID. RID is the identifier used in the majority of the downloadable csv files.

I believe searching under PATIENTS is correct.
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Due to serious data quality concerns, all data with PTIDs containing the format 381_S_10### have been removed from the ADNI data repository. ADNI leadership strongly advises that data with these PTIDs not be used in any data analysis, submission of abstracts, or publications. Furthermore, ADNI leadership requests that any abstracts or papers which have been submitted using this data be appropriately revised due to concerns with data quality. More information click here.

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