Table 5.
Calculation of probability of acceptable recall of a PubMed sample of systematic reviews
| Frequency | Frequency percentage (a) (%) | Probability recall > 95% (b) (%) | a × b (%) | Probability recall 100% (c) (%) | c × b (%) | |
|---|---|---|---|---|---|---|
| EM-ML | 73 | 37 | 47 | 17 | 24 | 9 |
| ML | 41 | 21 | 16 | 3 | 9 | 2 |
| EM-ML-WoS | 40 | 20 | 64 | 13 | 36 | 7 |
| ML-WoS | 21 | 11 | 21 | 2 | 16 | 2 |
| ML-GS | 7 | 4 | 26 | 1 | 16 | 1 |
| ML-WoS-GS | 7 | 4 | 37 | 1 | 29 | 1 |
| EM-ML-GS | 5 | 3 | 76 | 2 | 41 | 1 |
| EM | 2 | 1 | 19 | 0 | 14 | 0 |
| EM-WoS | 1 | 1 | 40 | 0 | 28 | 0 |
| WoS | 1 | 1 | 7 | 0 | 7 | 0 |
| Total | 198a | 100 | 40 | 23 |
aTwo reviews did not use any of the databases used in this evaluation