Validity

In a study, validity is the degree to which the conclusions that the researchers make can be considered to be ‘true’, based on how well the study was designed and how well the study matched ‘real life’ situations. External validity is the extent to which the...

Utility

A measure of how desirable an outcome is, generally expressed as a number between zero and one. For example, a full healthy life would be given a value of one, whereas death is given a value of zero. Utility can also mean a patient’s preferred outcome.  HTAI

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