| Dec 2002-Nov 2003 | Dec 2003-Nov 2005 | Dec 2005-Nov 2006 | |||||||||||||
| mean | ± | sd | p | mean | ± | sd | p | mean | ± | sd | p | ||||
| Number of articles (n/month) | |||||||||||||||
| JP papers | 48.5 | ± | 19.2 | *** | 92.8 | ± | 43.1 | ***, ## | 60.3 | ± | 29.4 | ***, # | |||
| US papers | 3.8 | ± | 4.3 | 16.2 | ± | 22.3 | 6.8 | ± | 3.1 | ||||||
| Geographic focus (%) | |||||||||||||||
| JP papers | US topics | 4.1 | ± | 3.4 | 29.9 | ± | 13.0 | ### | 25.9 | ± | 15.8 | ||||
| Japan topics | 97.3 | ± | 2.2 | *** | 88.2 | ± | 7.9 | ***, ### | 93.5 | ± | 4.7 | ***, # | |||
| Other countries | 7.8 | ± | 4.6 | 6.3 | ± | 4.8 | 6.0 | ± | 4.4 | ||||||
| US papers | US topics | 88.3 | ± | 17.7 | *** | 87.7 | ± | 18.0 | *** | 94.9 | ± | 9.9 | *** | ||
| Japan topics | 14.1 | ± | 19.2 | 19.7 | ± | 21.4 | 34.9 | ± | 33.2 | ||||||
| Other countries | 68.6 | ± | 39.0 | *** | 42.2 | ± | 26.1 | ***, # | 32.9 | ± | 27.7 | *** | |||
| Topic categories (%) | |||||||||||||||
| JP papers | Incidents | 7.1 | ± | 8.9 | 5.0 | ± | 4.8 | 2.8 | ± | 2.7 | |||||
| Biomedical effects | 12.5 | ± | 10.0 | 7.7 | ± | 4.4 | 3.0 | ± | 2.7 | ## | |||||
| Commerce | 60.6 | ± | 12.8 | * | 61.9 | ± | 13.4 | *** | 55.6 | ± | 20.5 | ** | |||
| Agriculture | 30.0 | ± | 18.5 | 9.9 | ± | 4.8 | ### | 5.8 | ± | 4.3 | # | ||||
| Trade | 30.0 | ± | 18.5 | 9.9 | ± | 4.8 | ### | 5.8 | ± | 4.3 | # | ||||
| US papers | Incidents | 61.2 | ± | 37.3 | *** | 66.2 | ± | 17.5 | *** | 53.4 | ± | 20.1 | *** | ||
| Biomedical effects | 23.6 | ± | 38.9 | 18.4 | ± | 15.1 | ** | 16.5 | ± | 22.9 | |||||
| Commerce | 35.9 | ± | 29.7 | 31.6 | ± | 15.3 | 29.2 | ± | 18.7 | ||||||
| Agriculture | 60.5 | ± | 42.3 | * | 44.8 | ± | 20.6 | *** | 41.1 | ± | 19.8 | *** | |||
| Trade | 60.5 | ± | 42.3 | * | 44.8 | ± | 20.6 | *** | 41.1 | ± | 19.8 | *** | |||