add REDCap ID to any dataframe using a ref_id
Usage
add_ID_to_DF(DF, DB, ref_id)
Arguments
- DF
dataframe
- DB
A validated `DB` object containing REDCap project data and settings. Generated using load_DB or setup_DB
- ref_id
column name that matches a REDCap variable name that could be an ALT id such as MRN
Value
original dataframe with REDCap id_col added as the first column
