What is an estimand?
What is an estimand?
From the glossary of the ICH E9: estimands addendum:
A precise description of the treatment effect reflecting the clinical question posed by the trial objective. It summarises at a population-level what the outcomes would be in the same patients under different treatment conditions being compared.
Where should I start?
The trainings page is a starting point. Further, a 3min intro video: What is an estimand in a clinical trial: The PIONEER 1 example.
See also the publications page.