Follow-up duration is calculated automatically from your data if the following variables are available:
- Inclusion date
- Last follow-up date
To convert this duration in months, we divide the number of days between the 2 dates by 30.5
FU duration (months) = (Last follow-up date - Inclusion date) / 30.5
You can still create a new dynamic variable to calculate the follow-up duration with another formula if you prefer.
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