Table 4 Coverage rates of individual databases
Databases | RCTs found (n) | Overall recalla (%) | Mean recall per SRb (%) | Median recall per SRc (%) | 100% recall per SRd (%) |
|---|---|---|---|---|---|
CENTRAL | 405 | 91.6 | 92.1 | 100.0 | 75.3 |
Google Scholar | 390 | 88.2 | 88.7 | 95.2 | 47.1 |
EMBASE | 378 | 85.5 | 87.6 | 100.0 | 50.6 |
PEDro | 366 | 82.8 | 85.0 | 93.8 | 37.6 |
MEDLINE/PubMed | 366 | 82.8 | 83.8 | 90.0 | 36.5 |
Web of Science | 320 | 72.4 | 76.7 | 82.1 | 24.7 |
CINAHL | 290 | 65.6 | 62.9 | 66.7 | 17.6 |
AMED | 225 | 50.9 | 54.5 | 55.6 | 8.2 |
ICL | 84 | 19.0 | 19.6 | 14.9 | 2.4 |
Total RCTs found by any of the nine databases investigated | 424 | 95.9 | – | – | – |