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% |