Table 4.
Summary of screening workload savings for three systematic reviews
| Screening rule | TP | FP | FN | TN | Pr | Re | Work saved |
|---|---|---|---|---|---|---|---|
| Hamra 2014 (n = 615 articles) | Max = 97.2% | ||||||
| All 4 PECO Terms | 5 | 5 | 12 | 593 | 50% | 29% | 98.4% |
| Any 3 PECO Terms | 12 | 24 | 5 | 574 | 33% | 71% | 94.1% |
| Any 2 PECO Terms | 17 | 89 | 0 | 509 | 16% | 100% | 82.8% |
| PEO | 11 | 17 | 6 | 581 | 39% | 60% | 95.4% |
| PE | 11 | 13 | 6 | 585 | 46% | 65% | 96.1% |
| EO | 17 | 65 | 0 | 533 | 21% | 100% | 86.7% |
| Johnson 2014 (n = 2470 articles) | Max = 99.3% | ||||||
| All 4 PECO Terms | 3 | 1 | 14 | 2455 | 75% | 18% | 99.8% |
| Any 3 PECO Terms | 14 | 12 | 3 | 2441 | 54% | 82% | 98.9% |
| Any 2 PECO Terms | 16 | 60 | 1 | 2393 | 21% | 94% | 96.9% |
| PEO | 13 | 49 | 4 | 2413 | 25% | 76% | 97.5% |
| PE | 13 | 5 | 4 | 1551 | 72% | 76% | 99.3% |
| EO | 16 | 11 | 1 | 2442 | 59% | 94% | 98.9% |
| Thayer 2013 (n = 1880 articles) | Max = 99.4% | ||||||
| All 4 PECO Terms | 7 | 20 | 13 | 1840 | 26% | 35% | 98.6% |
| Any 3 PECO Terms | 9 | 83 | 2 | 1786 | 10% | 82% | 95.1% |
| Any 2 PECO Terms | 11 | 304 | 0 | 1565 | 3% | 100% | 83.2% |
| PEO | 7 | 116 | 4 | 1753 | 6% | 64% | 93.5% |
| PE | 14 | 45 | 6 | 1815 | 24% | 70% | 96.9% |
| EO | 11 | 195 | 0 | 1674 | 5% | 100% | 89.0% |
| Average (n = 4965 articles) | Max = 99.1% | ||||||
| All 4 PECO Terms | 15 | 26 | 39 | 4888 | 37% | 28% | 99.2% |
| Any 3 PECO Terms | 35 | 119 | 10 | 4801 | 23% | 78% | 96.9% |
| Any 2 PECO Terms | 44 | 453 | 1 | 4467 | 9% | 98% | 90.0% |
| PEO | 31 | 182 | 14 | 4747 | 15% | 69% | 95.7% |
| PE | 38 | 63 | 16 | 3951 | 38% | 70% | 98.0% |
| EO | 44 | 271 | 1 | 4649 | 14% | 98% | 93.7% |
Work saved is the proportion of all positives in the entire set of n references (i.e., 1 − (TP + FP)/n)
TP true positive, FP false positives, FN false negative, TN true negative, P precision, Re recall