Table 1 Recall, precision and NNR for each strategy
Database | Number of records retrieved | Number of included records | Unique yield | Recall (%) (n = 250) | Precision (%) | Number needed to read (NNR) | Sensitivity × Precision |
|---|---|---|---|---|---|---|---|
MEDLINE via OVID | 19058 | 216 | 109 | 87 | 1.13 | 89 | 98.31 |
SCOPUS | 14258 | 109 | 3 | 44 | 0.77 | 130 | 33.88 |
Cochrane Methodology Register | 1082 | 9 | 0 | 4 | 0.83 | 121 | 3.32 |