Table 7.
Performance of Specificity Filters against Validation Sets.
| MEDLINE | EMBASE | MEDLINE/EMBASE Deduplicated | ||||
| No filter | Filter | No filter | Filter | No filter | Filter | |
| PRK | ||||||
| Reference Standard | 39 | 39 | 33 | 32 | 39 | 39 |
| Total retrieved | 682 | 452 | 503 | 393 | 792 | 567 |
| Reference standard retrieved (%) | 100.0 | 97.0 | 100.0 | |||
| Reduction in retrievals (%) | 33.7 | 21.9 | 28.4 | |||
| Tonsillectomy | ||||||
| Reference Standard | 27 | 23 | 27 | 26 | 30 | 30 |
| Total retrieved | 1466 | 886 | 1213 | 852 | 1712 | 1196 |
| Reference standard retrieved (%) | 85.2 | 96.3 | 100.0 | |||
| Reduction in retrievals (%) | 39.6 | 29.8 | 30.1 | |||