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
| Â | 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) |