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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.