Match respondents across consultations

Our user Luca Parisotto has sent the following question:

…, we are working in a hospital and healthcare providers are using the tablets as job-aids, collecting data while they do consultations. We want to easily match respondents across consultations while relying on the least amount of confidential information possible (so ideally without using names, etc.). For this we’d need a unique interview code which the providers can write down on the clients’ dossiers and their registers, to enter the code again into the tablet when the client returns for a follow-up consultation.

Recommendation: Preload the unique code into a hidden variable during assignment creation, display it in a static text when you reach a point in the interview where it must be issued.