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In studies of treatment effects, outcomes are measures of health or disease (e.g. survival, having a stroke, pain or quality of life), behaviours (e.g. smoking), or other potential benefits or harms of treatments (e.g. resource use) that affect the natural progress of the health condition that is being treated.
They are measured in studies of treatment effects to find out what effect a treatment has on them; i.e. whether they are increased or decreased.
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