Statistics

The iCite database was last updated on December 12, 2017 and currently contains 16,725,809 publications, of which 12,722,372 have an RCR greater than 0. iCite covers the years 1995 through 2017.

Distribution

RCR distribution

The distribution of RCRs for publications with RCR greater than 0 is shown above, with the tail truncated at 5.

Percentiles for NIH-funded publications

NIH-funded papers are the benchmark for RCR: Any paper with RCR 1.0 has an RCR higher than 50% of NIH-funded papers. Some other RCR percentiles for NIH-funded papers are shown below.

Percentile 99.9 99.0 95.0 90.0 80.0 70.0 60.0 50.0 40.0 30.0 20.0 10.0
RCR 38.00 13.11 5.72 3.81 2.39 1.72 1.30 1.00 0.76 0.56 0.38 0.20

Percentiles for all publications

The iCite database contains many papers that were not NIH-funded. RCR percentiles for the full iCite database are shown below.

Percentile 99.9 99.0 95.0 90.0 80.0 70.0 60.0 50.0 40.0 30.0 20.0 10.0
RCR 23.62 7.98 3.45 2.24 1.31 0.86 0.57 0.37 0.22 0.10 0.00 0.00

RCR Stability

RCR Stability

Figure 1: Stability of RCR over time. (A-E) Change in RCR over time for individual NIH-funded articles published in 1991. Articles were assigned to quintiles based on their RCR values in the year after publication (1992); RCR in each subsequent year was calculated. For each quintile, 200 individual articles (gray lines) were chosen at random from the subset whose 1992 values were within 10% of the median, and the resulting plots are shown. All values are actual and unsmoothed. In (A) through (E), the red line shows the median for the respective quintile. (A) Top quintile; (B) Upper mid quintile; (C) Mid quintile; (D) Lower mid quintile; (E) Bottom quintile; (F) Median RCR in each of the five quintiles for all NIH-funded articles published in 1991.