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Table 4 Factors that affect retrieval of individual articles

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

  Co-citation searchCo-citation + citation searches
TotalNumber retrievedPercentage*Number retrievedPercentage*
Overall4261193845.5267462.8
Times cited
 Not indexed59115726.618130.6
 036510.317648.2
 1–578710413.238548.9
 6–941115036.523757.7
 10–1965840661.748072.9
 20–4986261671.569180.2
  > 5058750485.952489.3
Indexed in WOS**
 No70318426.223533.4
 Yes3558175449.3243968.5
Number of references
 Not indexed59115726.618130.6
  < 5974445.44546.4
 5–91086560.27569.4
  > =103465167248.3237368.5
Years since publication
 0–1544448.128552.4
 1–248711824.224349..9
 2–5108140237.260656.1
 5–1099458558.968669.0
  > 10115578968.385473.9
  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