Table 3.
Contribution of unique citations by databases beyond a PubMed search.
| Database | Total number of citations when combined with PubMed (duplicates included) | Total after duplicate pairs removed | Number of unique citations contributed by non-PubMed database | Number of unique journal citations* contributed by non-PubMed database | ||
|---|---|---|---|---|---|---|
| n | % | n | % | |||
| Embase | 12,398 | 3637 | 2728 | 75.0 | 513 | 14.1 |
| CINAHL | 7448 | 4225 | 773 | 18.3 | 744 | 17.6 |
| PsycINFO | 6991 | 4809 | 897 | 18.7 | 636 | 13.2 |
| Central | 5420 | 4847 | 108 | 2.2 | 105 | 2.2 |
| Econlit | 5097 | 5038 | 62 | 1.2 | 45 | 0.9 |
* Excludes conference abstracts, proceedings, theses, books, book chapters, and reports.