. 2008 Jul 29;99(4):569–576. doi: 10.1038/sj.bjc.6604531

Table 2. Mean values of RL, of PCI and of a log function of PCI [1+2log₁₀(1+PCI)] (LOG) for oncology papers from years 2000–2004 (ONCOL), and for the papers cited by the BBC cancer stories (BBC).

ONCOL	2000	2001	2002	2003	2004	BBC
Mean RL	2.26	2.28	2.27	2.28	2.29	2.06
Mean PCI	13.4	13.7	13.9	13.9	14.3	34.0
Mean LOG	3.07	3.09	3.11	3.11	3.14	3.79

LOG=logarithmic function; PCI=potential citation impact; RL=research level.

Table 2. Mean values of RL, of PCI and of a log function of PCI [1+2log10(1+PCI)] (LOG) for oncology papers from years 2000–2004 (ONCOL), and for the papers cited by the BBC cancer stories (BBC).