Prevent data entry if previous visit has certain values

kristiakkristiak Posts: 1,251 ✭✭✭
Hi,
We have follow-up visits at week 1, month 1, 3 and 6. At each visit we ask if they have stopped taking the medication. But we would like to prevent them from answering the questions if the they have already answered this question at a preceding visit. Can this be done??
Best

Krister
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