Impact Factor & Ranking

4.4 3.3 2.2 1.1 4.17 2015 2016 2017 2018 2019 4.17 2015 2016 2017 2018 2019
  • 1 133
    #59
  • 1 166
    #64
  • 1 124
    #43
  • 1 286
    #0
  • 1 138
    #41
  • 1 166
    #48
  • 1 128
    #31
  • 1 143
    #43
  • 1 171
    #51
  • 1 133
    #39
  • 1 145
    #51
  • 1 173
    #51
  • 1 136
    #50
  • 1 143
    #35
  • 1 177
    #42
  • 1 138
    #43

About Impact Factor & Ranking

Measure of the number of times an average paper in this journal is cited. Copyright Clarivate Analytics.

Metrics

Year I.F. Endocrinology & metabolism Genetics & heredity Medicine, research & experimental
2019 4.170 35/143 42/177 43/138
2018 51/145 51/173 50/136
2017 43/143 51/171 39/133
2016 41/138 48/166 31/128
2015 59/133 64/166 43/124

Definition

Impact Factor

The Journal Impact Factor is published each year by Clarivate Analytics. It is a measure of the number of times an average paper in a particular journal is cited during the preceding two years.
For example:

A = the number of times articles published in a specific journal in 2014 and 2015 were cited by journals during 2016.
B = the total number of 'citable items' published by that journal in 2014 and 2015. ('Citable items' are usually articles, reviews, proceedings, etc.; not editorials or letters-to-the-editor.)

2016 impact factor = A/B.

Actual value is intentionally only displayed for the most recent year. Earlier values are available in the Journal Citation Reports from Clarivate Analytics

ISI ranking

Journals are often ranked by Impact Factor in an appropriate Clarivate Analytics subject category. As there are now two Impact Factors published – two-year and five-year Impact Factors – this rank may differ, so care is needed when assessing these ranked lists to understand which of the two metrics is being used. In addition, journals can be categorized in multiple subject categories, giving them different ranks for each subject. Consequently, a rank should always be in context to the subject category.