Table 6
Overview of the observational study search filter's performance in PubMed and Embase
PubMed | ||
Relevant records in a retrospective search (= gold standard, a+b): 84 | Irrelevant records in a retrospective search (c+d): 10,983 | |
Records retrieved with search filter (a+c): 3,604 | True positives a): 71 | False positives (c): 3,533 |
Records not retrieved with search filter: 7,463 | False negatives (b): 13 | True negatives (d): 7,450 |
Embase | ||
Relevant records in a retrospective search (= gold standard, a+b): 77 | Irrelevant records in a retrospective search (c+d): 17,019 | |
Records retrieved with search filter (a+c): 9,078 | True positives (a): 74 | False positives (c): 9,004 |
Records not retrieved with search filter: 8,018 | False negatives (b): 3 | True negatives (d): 8,015 |