Clinical Chemistry Citation Rankings 2000-2009
| Year | Impact Factor |
Total Cites |
Immediacy Index |
Cited Half-Life |
Published Articles |
|---|---|---|---|---|---|
| 2009 | 6.263 | 24,297 | 2.066 | 8.5 | 212 |
| 2008 | 5.579 | 23,068 | 1.528 | 8.6 | 237 |
| 2007 | 4.803 | 21,094 | 1.114 | 8.0 | 280 |
| 2006* | 5.454* | 19,949 | 1.088 | 7.9 | 274 |
| 2005 | 7.717 | 18,052 | 0.839 | 7.6 | 391 |
| 2004 | 6.501 | 17,366 | 1.675 | 7.5 | 197 |
| 2003 | 5.538 | 16,368 | 1.548 | 7.9 | 188 |
| 2002 | 4.788 | 16,108 | 0.846 | 8.2 | 253 |
| 2001 | 4.371 | 15,762 | 1.140 | 7.9 | 228 |
| 2000 | 4.261 | 15,822 | 0.681 | 7.8 | 276 |
*As in past years, Clinical Chemistry has the highest impact factor in the field. The 2006 impact factor of the next highest journal is 3.032. The 2006 impact factor for Clinical Chemistry cannot be compared with the 2005 impact factor because the way it was determined has changed. Under the old calculation method, the 2006 impact factor is about 8.1. As with other statistics, changes in counting require a new baseline to be used for monitoring of trends. The new baseline will not be known until next year because the calculation covers a 2-year period. – David E. Bruns, MD, Editor (1990-2007), Clin Chem 2007;53:1562.
The Impact Factor is a measure of the frequency with which the “average article” in a journal has been cited in a particular year. The Impact Factor will help you evaluate a journal’s relative importance, especially when you compare it to others in the same field. The Impact Factor is calculated by dividing the number of current citations to articles published in the two previous years by the total number of articles published in the two previous years.
The Total Cites (total citations) indicates the total number of times that each journal has been cited by all journals included in the ISI database within the current product year.
The Immediacy Index is a measure of how quickly the “average article” in a journal is cited. The Immediacy Index will tell you how often articles published in a journal are cited within the same year. The Immediacy Index is calculated by dividing the number of current citations to articles published in the same year by the number of articles published in the current year.
The Cited Half-Life is the number of publication years from the current year which account for 50% of current citations received. This figure helps you evaluate the age of the majority of cited articles published in a journal. Only those journals cited 100 or more times have a Cited Half-Life.
Rankings and Definitions above taken from the Journal Citation Reports®, Science Edition, a publication of the Thomson Reuters. Please visit The Thomson Reuters Impact Factor website for more detailed information on how these rankings are calculated.