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Table 1 Elements needed to define an outcome

From: Caveat emptor: the combined effects of multiplicity and selective reporting

Element

Description

1. Domain

Title or concept that describes the outcome

2. Specific measure

Tool or instrument that assesses the outcome domain, including the name of the tool or instrument and/or specific diagnostic criteria and ascertainment procedures

3. Time point

When the outcome will be assessed

4. Specific metric

Ways to characterize measurement on each individual (e.g., change in a measurement from baseline to a specific time point)

5. Method of aggregation

Ways to summarize individual-level measurements into group-level statistics for estimating treatment effect, including if the outcome will be treated as a continuous, categorical, or time-to-event variable and, if relevant, the specific cutoff or categories