From: Boolean versus ranked querying for biomedical systematic reviews
 | Drug Dataset | Misc Dataset | ||||
---|---|---|---|---|---|---|
Review | Tier 0 | Tier 1 | Tier 2 | Tier 0 | Tier 1 | Tier 2 |
1 | 2,544 | 183 | 41 | 616 | 38 | 12 |
2 | 851 | 84 | 20 | 1,733 | 273 | 92 |
3 | 310 | 92 | 16 | 32,308 | 421 | 198 |
4 | 1,120 | 363 | 146 | 4,949 | 413 | 83 |
5 | 2,072 | 302 | 42 | 10 | 508 | 104 |
6 | 1,218 | 279 | 100 | 505 | 130 | 34 |
7 | 368 | 80 | 80 | 1,261 | 1,103 | 440 |
8 | 393 | 88 | 41 | 14,935 | 796 | 65 |
9 | 1,915 | 48 | 15 | 10 | 329 | 21 |
10 | 503 | 139 | 136 | 243 | 535 | 121 |
11 | 1,333 | 238 | 51 | 1,235 | 2,329 | 365 |
12 | 1,643 | 34 | 9 | 682 | 158 | 77 |
13 | 3,465 | 173 | 85 | Â | Â | Â |
14 | 671 | 218 | 24 | Â | Â | Â |
15 | 327 | 78 | 40 | Â | Â | Â |
Avg. | 1248.5 | 159.3 | 56.4 | 4537.2 | 604.2 | 138.2 |