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Table 1 - Format categories (all items in the 170 clinical journals, 161 of which were indexed in MEDLINE, were categorized for format)

Format type
Definition
Original study

Any full text article in which the authors report first-hand observations

Review article

Any full text article that is bannered 'review, overview, or meta-analysis' in the title or in a section heading, or it is indicated in the text of the article that the intention was to review, summarize, or highlight the literature on a particular topic.

General article

A general or philosophical discussion of a topic without original observation and without a statement that the purpose was to review a body of knowledge.

Case report

An original study or report that presents only individualized data.