Hi,

I am trying to compile a data dictionary for some of the NKI-Rockland data, but I have run into some confusion with the meanings of some variable names. 

Particularly, I was hoping someone could tell me what the first letters ('f', 'n', and 'p') in the variable names under the CARE section mean.

For example: "fdrug", "ndrug", and "pdrug". 

I've looked at the description of the evaluation (http://www.sjdm.org/dmidi/Cognitive_Appr...), but I do not see what these letters match to.

Any help would be greatly appreciated.

Thanks!