The adnimerge table has the 11 and 13 item versions of ADAS totals (ADAS11 and ADAS13) across all phases of ADNI. The table is located at "Study Info" > "Key ADNI tables merged into one table" > "Key ADNI tables merged into one table".
The adnimerge table is also included in the R, SAS, Stata, and SPSS packages.
Mike