title: Structured abstracts: narrative review.
abstract: OBJECTIVE
  To summarize the main findings from research on structured abstracts.
  
  
  METHODS
  A narrative review of all the relevant papers known to the author was conducted.
  
  
  RESULTS
  Authors and readers judged the structured abstracts to be more useful than traditional ones. In 1987 the Ad Hoc Working Group for Critical Appraisal of the Medical Literature proposed guidelines for informative seven-headings abstracts. In 1990 Haynes et al. reconsidered the structured abstract of clinical research and review articles and proposed revised guidelines. Nowadays, most abstracts are informative, and the most commonly used structure is IMRAD (Introduction, Methods, Results And Discussion) format.
  
  
  CONCLUSIONS
  There are many variations in the structured-abstract formats prescribed by different journals. But even in recent years, not all abstracts of original articles are structured. More research is needed on a number of questions related to the quality and utility of structured abstracts.
authors.affiliation: Department of Surgery, School of Medicine, Federal University of Rio de Janeiro, Brazil.
authors.forename: Carlos Alberto
authors.initials: CA
authors.lastname: Guimarães
mesh_terms: D000043:Abstracting and Indexing / Q000145:classification / Q000592:standards*; D006801:Humans; D010506:Periodicals as Topic / Q000592:standards*; D012196:Review Literature as Topic; D014956:Writing / Q000592:standards*