Scimago Journal & Country Rank

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Country United States  - SIR icon SIR Ranking of United States
H Index
Subject Area and CategoryMedicine
PublisherImpact Journals
Publication typeJournals
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The set of journals have been ranked according to their SJR and divided into four equal groups, four quartiles. Q1 (green) comprises the quarter of the journals with the highest values, Q2 (yellow) the second highest values, Q3 (orange) the third highest values and Q4 (red) the lowest values.


The SJR is a size-independent prestige indicator that ranks journals by their 'average prestige per article'. It is based on the idea that 'all citations are not created equal'. SJR is a measure of scientific influence of journals that accounts for both the number of citations received by a journal and the importance or prestige of the journals where such citations come from It measures the scientific influence of the average article in a journal, it expresses how central to the global scientific discussion an average article of the journal is.

Citations per document

This indicator counts the number of citations received by documents from a journal and divides them by the total number of documents published in that journal. The chart shows the evolution of the average number of times documents published in a journal in the past two, three and four years have been cited in the current year. The two years line is equivalent to journal impact factor ™ (Thomson Reuters) metric.

Cites per documentYearValue
Cites / Doc. (4 years)20100.000
Cites / Doc. (4 years)20115.107
Cites / Doc. (4 years)20127.961
Cites / Doc. (4 years)20137.045
Cites / Doc. (4 years)20146.922
Cites / Doc. (4 years)20155.744
Cites / Doc. (4 years)20165.365
Cites / Doc. (4 years)20174.819
Cites / Doc. (3 years)20100.000
Cites / Doc. (3 years)20115.107
Cites / Doc. (3 years)20127.961
Cites / Doc. (3 years)20137.045
Cites / Doc. (3 years)20146.981
Cites / Doc. (3 years)20155.707
Cites / Doc. (3 years)20165.285
Cites / Doc. (3 years)20174.804
Cites / Doc. (2 years)20100.000
Cites / Doc. (2 years)20115.107
Cites / Doc. (2 years)20127.961
Cites / Doc. (2 years)20137.137
Cites / Doc. (2 years)20146.913
Cites / Doc. (2 years)20155.297
Cites / Doc. (2 years)20165.229
Cites / Doc. (2 years)20174.667
Total Cites 

Evolution of the total number of citations and journal's self-citations received by a journal's published documents during the three previous years.
Journal Self-citation is defined as the number of citation from a journal citing article to articles published by the same journal.

Self Cites20100
Self Cites201170
Self Cites2012359
Self Cites2013251
Self Cites2014628
Self Cites20151638
Self Cites20164649
Self Cites20178677
Total Cites20100
Total Cites2011383
Total Cites20121632
Total Cites20132374
Total Cites20143302
Total Cites20157624
Total Cites201623391
Total Cites201752075
External Cites per Doc 
Cites per Doc

Evolution of the number of total citation per document and external citation per document (i.e. journal self-citations removed) received by a journal's published documents during the three previous years. External citations are calculated by subtracting the number of self-citations from the total number of citations received by the journal’s documents.

External Cites per document20100
External Cites per document20114.173
External Cites per document20126.210
External Cites per document20136.300
External Cites per document20145.653
External Cites per document20154.481
External Cites per document20164.235
External Cites per document20174.004
Cites per document20100.000
Cites per document20115.107
Cites per document20127.961
Cites per document20137.045
Cites per document20146.981
Cites per document20155.707
Cites per document20165.285
Cites per document20174.804
% International Collaboration

International Collaboration accounts for the articles that have been produced by researchers from several countries. The chart shows the ratio of a journal's documents signed by researchers from more than one country; that is including more than one country address.

YearInternational Collaboration
Citable documents 
Non-citable documents

Not every article in a journal is considered primary research and therefore "citable", this chart shows the ratio of a journal's articles including substantial research (research articles, conference papers and reviews) in three year windows vs. those documents other than research articles, reviews and conference papers.

Non-citable documents20100
Non-citable documents201115
Non-citable documents201240
Non-citable documents201395
Non-citable documents2014124
Non-citable documents2015137
Non-citable documents2016393
Non-citable documents2017430
Citable documents20100
Citable documents201175
Citable documents2012205
Citable documents2013337
Citable documents2014473
Citable documents20151336
Citable documents20164426
Citable documents201710839
Cited documents 
Uncited documents

Ratio of a journal's items, grouped in three years windows, that have been cited at least once vs. those not cited during the following year.

Uncited documents20100
Uncited documents20119
Uncited documents201231
Uncited documents201360
Uncited documents201466
Uncited documents2015141
Uncited documents2016560
Uncited documents20171231
Cited documents20100
Cited documents201181
Cited documents2012214
Cited documents2013372
Cited documents2014531
Cited documents20151332
Cited documents20164259
Cited documents201710038
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