title: [Comparison of instructions to authors of Mexican medical journals and the Vancouver requirements].
abstract: OBJECTIVE
  To find out how much information of the Vancouver norms (VANNOR) are given to prospective authors in the instructions for authors (IFA) in some Mexican medical journals (MMJ).
  
  
  METHODS
  Prospective, cross sectional, descriptive, observational.
  
  
  METHODS
  To score the IFA in the MMJ published between 1989 and 1991. The scoring was done on the basis of presence in the IFA of the VANNOR characteristics grouped in categories (characteristics and presentation of the manuscript, title page, summary and keywords, text order and contents, references, tables, illustrations, and other instructions). A total score of 60 characteristics (grouped in nine categories) was obtained for each journal. Statistical differences as a function of VANNOR affiliation were investigated by means of Student's t test, chi-square, and exact Fisher tests using a 0.05 alpha level (two-tailed).
  
  
  RESULTS
  50 MMJ were included (21 affiliated to VANNOR). No statistical difference was found for VANNOR affiliation and registration in bibliographic data bases. But statistically significant higher scores were found in the affiliated journals in 12 of 60 characteristics (three of nine categories) and in the total score.
  
  
  CONCLUSIONS
  Independently of VANNOR affiliation, there were deficiencies in the IFA of all journals, particularly in instructions regarding the manuscript's contents. Possibly, some inadequacies in manuscripts might be prevented with IFA that comply more thoroughly with the VANNOR requirements.
authors.affiliation: Departamento de Metodología de Investigación, Instituto Nacional de Pediatría, Secretaría de Salud (INP), México, D.F.
authors.forename: M C
authors.initials: MC
authors.lastname: Sosa-de-Martínez
authors.forename: A
authors.initials: A
authors.lastname: Carnevale
authors.forename: J
authors.initials: J
authors.lastname: Avendaño-Inestrillas
mesh_terms: D008800:Mexico; D010506:Periodicals as Topic; D014956:Writing / Q000592:standards*
vernacular_title: Comparación de las normas para autores de revistas médicas mexicanas con las normas de Vancouver.