Examlex
All actions and purchases, even those of wealthy people, involve a sacrifice.
Placebo-controlled
A method in clinical trials where one group receives the treatment being tested and another (the control group) receives a placebo, to assess the treatment's effectiveness.
Case-control Study
A research study that compares patients who have a disease or outcome of interest (cases) with patients who do not have the disease or outcome (controls), to find associations between the disease and potential risk factors.
Retrospective
An approach in research that looks backwards, analyzing past events or data to identify trends, outcomes, or correlations.
Prospective
refers to looking forward or considering future possibilities and events.
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