Increased citation impact for BioMed Central journals


Every year,
BioMed Central calculates unofficial impact factors for journals that have
published a significant number of research articles but do not yet have an
official impact factor. These unofficial impact factors use the same citation
data and methodology used by Thomson Scientific’s official impact factor


Newly calculated
unofficial 2006 impact factors show a significantly increased citation rate for
BioMed Central journals. For example,
BMC Biology
and BMC Medicine, the flagship journals of the BMC
series, both increased their unofficial impact factors significantly. The 2006
unofficial impact factor for BMC
is 4.43 (up from 3.81 in 2005) while for BMC
the 2006 figure is 4.17 (up from 2.52 in 2005).


Updated unofficial impact factors for more than 50 journals published by
BioMed Central are listed on our Impact Factor FAQ
, alongside details of
official impact factors for a further 26 journals.

Overall, the
average unofficial impact factor for a BioMed Central journal increased by 0.39
compared to 2005. Other BioMed Central journals with impressive unofficial 2006
impact factors include Journal of
(4.36), Retrovirology (4.32), Cardiovascular Diabetology (4.00), Molecular
(3.62) and Journal of
Translational Medicine
(3.30). Updated official 2006 impact
factors will be released by Thomson Scientific in June.

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seung u. kim, md, phd

I urge you to start a new BMC toxicology journal. I’d be pleased to submit manuscript to the journal.

clemens festen

I am glad the impactfactor has risen considerably from 2005-2006. That’s good news for the open access approach. One very important background should be taken into account: what is the overal rise of the mean impact factor in the medical and biology fields.

Clemens Festen
Erasmus MC
the Netherlands