| MEDLINE | Embase | ||||
---|---|---|---|---|---|---|
No. of records in databasea | No. retrieved | % filtered out | No. of records in databasea | No. retrieved | % filtered out | |
Specific terms | 24 442 442 | 1 598 431 | 93.5 | 31 237 516 | 2 233 531 | 92.8 |
Non-specific terms | 24 442 442 | 1 532 739 | 93.7 | 31 237 516 | 1 734 459 | 94.4 |
Combined strategyb | 24 442 442 | 2 764 686 | 88.7 | 31 237 516 | 3 515 240 | 88.7 |