Fang FC, Casadevall A. Retracted science and the retraction index. Infection and Immunity 2011;79(10)
Overall, manuscript retraction appears to be occurring more frequently, although it is uncertain whether this is a result of increasing misconduct or simply increasing detection due to enhanced vigilance. The authors developed a novel measure, the "retraction index", by dividing the number of retractions by the total number of articles published by 17 journals ranging in impact factor 2.00 to 53.484 in the years 2001 to 2010. They found that the frequency of retraction varied among journals and showed a strong correlation with the journal impact factor.