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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%