Monitoring free text entries DE

Dear DHIS2 team,
I am trying to find a way to best monitor free text entries DE on an individual level (as it can’t be aggregated), either by a report or a dashboard…
First, how can I filter out empty data entries from the event report/line list tool (for text DE, the filtering only proposes “contains” or “is equal”) ?
Second, any ideas on how to do that best for users that don’t have access to any individual data apart from that DE?

Hi @CamilleR,
There might be an easier way to do this but have you thought about using a program rule which updates the value of another DE to true or false based on whether the DE has a value or not? And then you would be using two DEs to get your results.