one particular health outcome in a specific population. That finding may then be transformed into a headline claiming that the blood group determines longevity or aging.
Those are very different conclusions.
Association Does Not Automatically Mean Cause
This distinction is essential when reading health research.
If researchers discover that one characteristic occurs more frequently among people with a particular health outcome, that establishes an association. It does not necessarily establish that the characteristic caused the outcome.
Other factors may partly or completely explain the relationship.
Researchers therefore look at whether findings are replicated in other populations, whether there is a
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