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Table 5 Purpose categories

From: An overview of the design and methods for retrieving high-quality studies for clinical care

Purpose type Definition
Etiology Content pertained directly to determining if there was an association between an exposure and a disease or condition. The question is "What causes people to get a disease or condition?"
Prognosis Content pertains directly to the prediction of the clinical course or the natural history of a disease or condition with the disease or condition existing at the beginning of the study.
Diagnosis Content pertains directly to using a tool to arrive at a diagnosis of a disease or condition.
Treatment Content pertains directly to an intervention for therapy (including adverse effects studies), prevention, rehabilitation, quality improvement, or continuing medical education.
Cost Content pertains directly to the costs or financing or economics of a health care issue.
Economics Content pertains directly to the economics of a health care issue.
Clinical Prediction Guide Content pertains directly to the prediction of some aspect of a disease or condition.
Qualitative Content relates to how people feel or experience certain situations, and data collection methods and analyses are appropriate for qualitative data.
Something Else Content of the study does not fit any of the above definitions.