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Table 3 Development of the publication output

From: The development of general practice as an academic discipline in Germany - an analysis of research output between 2000 and 2010

Years

2000-2003

2004-2007

2008-2010

p-value

All

Number of publications

107

273

414

 

794

Number of groups with publication

19

25

25

 

28

Type of study

- cross-sectional

52.3%

56.4%

43.2%

.003

49.0%

- cohort/case–control

13.1%

8.8%

14.7%

.07

12.5%

- qualitative

10.3%

8.1%

10.9%

.47

9.8%

- intervention

10.3%

10.3%

8.0%

.53

9.1%

- systematic reviews

9.3%

8.1%

9.7%

.77

9.1%

- instrumental/other

3.7%

6.2%

9.4%

.08

7.6%

- diagnostic studies

0.9%

2.2%

4.1%

.14

3.0%

Subject of study

- health services research

43.0%

39.9%

38.4%

.68

39.5%

- clinical research

22.4%

26.0%

29.2%

.32

27.2%

- exploring patients’ views

10.3%

8.1%

6.3%

.33

7.4%

- methodology

5.6%

4.8%

9.2%

.07

7.2%

- medical education

2.8%

10.6%

5.1%

.004

6.7%

- various

15.9%

10.6%

11.8%

.36

12.0%

Authorship characteristics

- total number of authors

4 (1-45)

5 (1-27)

5 (1-86)

< .001

5 (1-86)

- number of authors GP division

2 (1-7)

3 (1-11)

3 (1-9)

.001

3 (1-11)

- proportion of GP authors

0.75 (0.02-1)

0.67 (0.04-1)

0.67 (0.01-1)

.27

0.67 (0.01-1)

- first author from GP division

70.1%

74.0%

70.3%

.054

71.5%

- last author from GP division

60.7%

62.3%

67.6%

.22

64.9%

- statistician as co-author

7.5%

11.7%

19.1%

.002

15.0%

- co-author from other department

36.8%

43.6%

46.9%

.17

44.4%

- international co-author

11.2%

13.9%

23.4%

.001

18.5%

Published in English

24.3%

45.5%

60.6%

< .001

50.5%

Impact factor

- median (range)

0 (0-10.0)

0.7 (0-16.7)

1.2 (0-36.4)

< .001

0.7 (0-36.4)

- without impact factor

59.8%

43.6%

31.9%

< .001

39.7%

- 0.001 to 2

35.5%

48.7%

58.0%

 

51.7%

- 2.001 to 4

9.3%

13.6%

21.5%

 

18.1%

- 4.001 to 10

3.7%

6.2%

8.2%

 

6.9%

- > 10

0.9%

1.5%

1.9%

 

1.6%