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Table 4 Productivity and patterns of collaboration by countries

From: Global collaborative networks on meta-analyses of randomized trials published in high impact factor medical journals: a social network analysis

Country Total papers, n Papers per million inhabitants, n Collaborations, n Distinct countries of collaborations, n Main collaborator(s) (number of collaborations)
USA 310 0.99 428 43 UK (63)
UK 297 4.73 380 44 USA (69)
Canada 143 4.15 200 29 USA (53)
Australia 70 3.14 165 30 UK (30)
Italy 57 0.94 205 29 USA (34)
The Netherlands 57 3.41 173 27 USA (27)
France 51 0.78 159 27 USA (26)
Germany 50 0.61 164 32 USA (30)
Switzerland 47 5.94 177 35 USA (25)
Denmark 41 7.36 124 28 UK (18)
Belgium 23 2.09 92 23 UK (14)
Sweden 21 2.22 69 14 USA (13)
Spain 19 0.41 76 28 USA (8)
Norway 14 2.83 56 20 UK and USA (11)
Japan 13 0.10 51 21 USA (9)
New Zealand 13 2.95 24 11 UK (8)
Finlad 11 2.04 43 14 Australia and USA (7)
Brazil 9 0.05 40 16 UK and USA (5)
Greece 8 0.71 12 5 UK and USA (4)
Israel 8 1.03 7 5 USA (3)
Ireland 6 1.31 24 14 UK (5)
China 6 0.00 10 7 USA (4)
South Africa 6 0.12 23 16 USA (4)
Argentina 5 0.12 24 13 Brazil, Switzerland, UK and USA (3)
Czech Republic 5 0.48 42 18 UK and USA (5)
Poland 5 0.13 23 13 UK (4)
South Korea 5 0.10 31 13 USA (4)
Austria 4 0.47 9 6 Germany (3)
Thailand 4 0.06 10 10 All countries (1)
Chile 3 0.17 10 8 Canada and USA (2)
India 3 0.00 2 2 Australia and UK (1)
Portugal 3 0.28 1 1 Canada (1)
Taiwan 3 0.13 3 3 Denmark, UK and USA (1)
Costa Rica 2 0.42 8 6 Canada and USA (2)
Hungary 2 0.20 16 14 UK and USA (2)
Pakistan 2 0.01 2 1 UK (2)
Russia 2 0.01 18 14 Belgium, Denmark, Germany, and UK (2)
Saudi Arabia 2 0.07 7 6 UK (2)
Serbia and Montenegro 2 0.28 4 2 Denmark and Italy (2)
Turkey 2 0.03 13 9 Australia, Canada, Switzerland and USA (2)
Colombia 1 0.02 6 6 All countries (1)
Cuba 1 0.09 5 5 All countries (1)
Gabon 1 0.65 10 10 All countries (1)
Ghana 1 0.04 10 10 All countries (1)
Latvia 1 0.49 12 12 All countries (1)
Mexico 1 0.01 1 1 USA (1)
Morocco 1 0.03 10 10 All countries (1)
Mozambique 1 0.04 10 10 All countries (1)
Republic of Malawi 1 0.07 1 1 UK (1)
Singapore 1 0.19 0 0 -
Tanzania 1 0.02 10 10 All countries (1)
  1. Note: Country inhabitants (year 2011) were obtained from the World Bank.