Question Posted 06/11/14:
Participant S_031_S_4005 is listed in the DXSUM_PDXCONV_ADNIALL.csv file as having converted from MCI to dementia on 4/30/2012 (EXAMDATE). However, in the LONI image archive the same participant is listed as having an MMSE of 30 on 4/12/2012 and an MMSE of 29 one year later on 4/18/2013.

With such a high MMSE, how do we know that this particular participant converted? What data were used to make the decision?

Thanks in advance for your help.
Response posted 07/08/14 by Sarah Walter:
Diagnostic change is based on the clinician's assessment. The score on Global CDR supports a change in diagnosis.