Skip to main content

Table 2 Factors that influence the percentage of articles included in each review that were retrieved by co-citation and citation searches combined

From: Novel citation-based search method for scientific literature: a validation study

  Number of reviews Percentage of articles retrieved
Median (IQR)
Number of citing articles
  < 20 7 37.5 (28.6, 60.0)
 20–50 26 63.3 (39.4, 85.7)
 50–100 48 65.0 (50.0, 87.5)
 100–200 74 80.0 (50.0, 90.1)
  > 200 95 77.6 (47.4, 93.8)
Similarity index*
  < 0.1 19 34.4 (15.4, 56.3)
 0.1–0.2 26 56.8 (36.1, 72.3)
 0.2–0.5 109 75.0 (51.7, 92.3)
  > =0.5 96 83.3 (60.4, 94.4)
Percentage of articles in PubMed
  < 90 64 62.4 (41.3, 80.3)
 90–100 64 67.1 (49.4, 84.5)
 100 122 82.8 (59.6, 100.0)
  1. *Similarity index = number of co-citations between query articles / number of citations of the less-cited query article. IQR inter-quartile range