Dear Jens,
Thanks for your helpful comment on creating an identifiant from various variables and double data entry (see below).
I just wanted to clarify a few things:
1) Does this mean that when using the 'Double Entry Verification' option (immediate comparison), this will not work if you have added any new variables into the .rec, or changed the order of the variables from the existing .rec?
2) If you use the other method of data verification (entering data into two seperate files and then validating duplicate files afterwards), is it possible to compare the old and new .rec files, even if a new variable has been added, or the order of the variables has been changed?
Will using the 'validate duplicate files' option work if the new .rec file has the variables in a different order?
Thanks so much for all your help,
Nicki Bailey
One aspect of this about unique identifiers is when users want to do double entry.
The only double entry option in this situation is to enter the data twice and then compare afterwards, since the "immediate comparison" double entry mode is not available for combined field unique entries unless the records are entered in EXACTLY the same sequence as the first time. The problem for the user is, that the system is NOT giving correct warnings in the immediate double entry if the unique index is created in contrast to entered directly.
I would like the identifier to be automatically created in the .rec file after entering 4 variables and as an aggregation of these 4 variables. For instance my identifier is ID=region number+village number+household number+member in the household number
regards Jens Lauritsen EpiData Association