Dear EpiData friends,

Im in project about adverse events of a particular kind of patients using some medications. The data entry has a rationale of every adverse event of a single patient has a different questionnaire.

This means that a unique number of the patient could be typed in the dataset more than once. So far ... OK

But we are plannig a double entry... and than the unique identifier of the patient may couse problmes and errors!

So I was thinking about creating a sequence for each adverse event, and than a patient 19230 would have a event A, B,C .... and so on

A unique variable could be automaticly created by patientnumber+uniqueevent wich could give something like 19230A, 19230B, 19230C and so on!

But this does not seem to me an elegante work around!

Does any one else have other suggestions?