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Question Posted 01/09/15:
Hello, I would like to ask how the variable DXCHANGE is assigned in the diagnostic summary files. Is it done using information only from the clinical tests like MMSE/CDR/ADAS-Cog? Or is the information from MRI/PET/CSF used as well? Is it procedure documented somewhere?

Thank you.
Response posted 01/14/15 by Jennifer Salazar:
As we discussed over phone. Clinical, cognitive, and functional testing are primarily used for diagnoses. Imaging is typically not used.
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