Skip to main content

Table 4 Factors that affect retrieval of individual articles

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

   Co-citation search Co-citation + citation searches
Total Number retrieved Percentage* Number retrieved Percentage*
Overall 4261 1938 45.5 2674 62.8
Times cited
 Not indexed 591 157 26.6 181 30.6
 0 365 1 0.3 176 48.2
 1–5 787 104 13.2 385 48.9
 6–9 411 150 36.5 237 57.7
 10–19 658 406 61.7 480 72.9
 20–49 862 616 71.5 691 80.2
  > 50 587 504 85.9 524 89.3
Indexed in WOS**
 No 703 184 26.2 235 33.4
 Yes 3558 1754 49.3 2439 68.5
Number of references
 Not indexed 591 157 26.6 181 30.6
  < 5 97 44 45.4 45 46.4
 5–9 108 65 60.2 75 69.4
  > =10 3465 1672 48.3 2373 68.5
Years since publication
 0–1 544 44 8.1 285 52.4
 1–2 487 118 24.2 243 49..9
 2–5 1081 402 37.2 606 56.1
 5–10 994 585 58.9 686 69.0
  > 10 1155 789 68.3 854 73.9
  1. *Percentage of articles included in reviews that were retrieved, by category. Query articles for all 250 reviews (n = 500) were removed from the dataset. **All articles are in WOS but not all are indexed. See methods for details