Top 20 countries in clinical medicine based on citations per paper

Data from Thomson Scientific’s Essential Science Indicators, 1 January 1997–31 October 2007

April 17, 2008

 Country/Territory Papers CitationsImpact
1 Finland22,758 386,397 16.98
2 Netherlands64,335 1,042,551 16.21
3 Denmark23,322 376,386 16.14
4 US709,347 11,326,659 15.97
5 Scotland23,774 374,017 15.73
6 Canada84,865 1,333,963 15.72
7 Switzerland39,837 614,622 15.43
8 Belgium30,713 470,997 15.34
9 Sweden46,871 713,694 15.23
10 Norway15,413 230,389 14.95
11 England167,891 2,357,951 14.04
12 Italy96,432 1,235,7 12.81
13 Australia57,342 733,180 12.79
14 New Zealand9,317 116,184 12.47
15 Austria25,840 305,999 11.84
16 France111,517 1,301,643 11.67
17 Germany173,039 1,939,097 11.21
18 Israel26,400 281,564 10.67
19 Spain51,135 532,146 10.41
20 Japan166,775 1,591,854 9.54
Essential Science Indicators lists countries ranked in the top 50 per cent for a field over a given period, based on total citations. In clinical medicine, 106 nations are listed, meaning 212 were surveyed. Twenty-six nations earned at least 100,000 citations. Finland, the Netherlands and Denmark top the list by impact, while producing only a fraction of that of the US, which is ranked fourth by impact.

The data above were extracted from Thomson Scientific’s Essential Science Indicators database. This database, currently covering the period January 1997 to December 2007, surveys only journal articles (original research reports and review articles) indexed by Thomson Scientific. Articles are assigned to a category based on the journals in which they were published and Thomson Scientific’s journal-to-category field definition scheme. Both articles tabulated and citation counts to those articles are for the period indicated. This ranking in clinical medicine is by citations per paper among nations that collected 100,000 or more citations to reveal weighted impact. For articles with multiple authors from different nations, each nation receives full, not fractional, citation credit. For more on Thomson Scientific’s Essential Science Indicators, see

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