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The impact that academic research has cannot be defined by one single metric. This is why we make our metrics transparent to show the many ways in which our journals are helping to create a healthier world.

In 2013, BMJ signed the San Francisco Declaration on Research Assessment (DORA). We did this to show our support for using various measures and metrics to portray journals’ impact; moving away from the Impact Factor as a single measure.  

Monitoring the metrics: speed, impact and reach of the research we publish.

Our metrics are displayed (where available) on all our journals’ platforms. 

Speed

  • Days to first decision: Mean number of days from first submission to first decision for peer-reviewed manuscripts
  • Days from acceptance to publication: Mean number of days from acceptance to online publication

Impact

  • Impact Factor (JCR): Calculated by Clarivate Analytics, the average number of citations in a single year of all articles published over the last two years.
    IF = number of citations in the given year/citable articles published in the previous two years
  • SciMago Journal Rank (SJR): Calculated from the Scopus database, the average number of weighted citations (dependent on the number of citations and the prestige of the journals where they came from) in a single year of all articles published in the previous three years 
  • Eigenfactor: Calculated from the Journal Citation Reports (JCR) database from Web of Science, the number of weighted citations (dependent on usage of the journal that they came from) in a single year of all articles published in the previous five years, discounting self-citations
  • CiteScore: Calculated from the Scopus database, the average number of citations in a single year and last three years of all items published during that same four-year period

Reach

  • Content Accesses: The total number of times that all articles have been accessed in a full year, including downloads, as recorded by Google Analytics.
  • Total Altmetric mentions: The total number of mentions from online media outlets that our journal’s content (published in a single year) receives within that year, as recorded by Altmetric. Media outlets include: patents, policy documents, social media mentions, blogs, news, and peer review.

Author Hub 

For some useful information and resources, please see the BMJ Author Hub

 

Some other useful resources

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