Unique article ranking system
Faculty Members rate the significance of selected articles to help focus your reading
By rating articles based on their individual merits rather than the journal in which they appear, this system provides a useful alternative to impact factors and citation scores.
Faculty Members rate the articles they choose as either “Recommended”, “Must Read” or “Exceptional”, which corresponds to F1000 Factors of 3, 6 and 9, respectively.
If an article has more than one evaluation, to give a weighted average with a positive bias for the number of evaluations and their ratings, its F1000 Factor is calculated by the following formula: Mean of Highest Two Scores + (Sum of All Scores/30) = F1000 Factor
For example, if an article is picked by three Faculty Members, with two rating it as “Must Read” and one as “Exceptional”, this would yield an F1000 Factor of: (6+9)/2 + (6+6+9)/30 = 8.2
The highest score received is used to calculate the article's overall rating, in this case - “Exceptional”.
Individual Faculty Members rate the articles they choose using the following criteria:
Recommended
F1000 Factor 3.0
F1000 rating of 3 or more
Key articles for those in the sub-specialty
Must Read
F1000 Factor 6.0
F1000 rating of 6 or more
Either a landmark article within a sub-specialty or an important article across the specialty
Exceptional
F1000 Factor 9.0
F1000 rating of 9 or more
“Exceptional” A landmark article for medicine
You can sort, search and browse by the F1000 Factor.
Faculty Members also indicate whether an article suggests a change in current clinical practice and offer a description of what the change could be. Although a key part of the service, this is a separate feature from the rating system.

