Table 3. F1-measure results for Global Context (GC), SubTree (ST), and Local Context (LC) kernel methods with and without the NCT augmenting features.
| Category | Test Size | GC (%) | ST (%) | LC (%) | ||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| - | +NCT | ↑ | - | +NCT | ↑ | - | +NCT | ↑ | ||||
| DrugBank | +Negation | -Connector | 971 | 56.5 | 62.2 | 5.7 | 61.0 | 68.5 | 7.5 | 62.6 | 65.2 | 2.6 |
| +Connector | 396 | 51.7 | 58.4 | 6.7 | 63.2 | 63.4 | 0.2 | 58.0 | 63.1 | 4.9 | ||
| -Negation | +Connector | 1,005 | 62.3 | 66.2 | 3.9 | 58.6 | 73.8 | 15.4 | 64.8 | 69.5 | 4.8 | |
| -Connector | 2,893 | 64.8 | 72.9 | 8.1 | 36.3 | 39.1 | 2.8 | 63.9 | 69.9 | 5.8 | ||
| Total | 5,265 | 61.7 | 68.3 | 6.5 | 47.1 | 53.0 | 5.9 | 63.4 | 68.4 | 4.9 | ||
| MEDLINE | +Negation | -Connector | 198 | 31.1 | 39.2 | 8.1 | 18.7 | 22.7 | 4 | 39.4 | 50.6 | 11.2 |
| +Connector | 161 | 28.3 | 38.2 | 9.9 | 17.9 | 23.1 | 5.2 | 40.1 | 50.1 | 10 | ||
| -Negation | +Connector | 443 | 34.6 | 38.4 | 3.8 | 18.9 | 19.8 | 0.9 | 44.2 | 48.7 | 4.5 | |
| -Connector | 1436 | 34.1 | 40.6 | 6.5 | 18.2 | 18.4 | 0.2 | 41.7 | 44.8 | 3.1 | ||
| Total | 2238 | 33.9 | 38.8 | 5.9 | 18.4 | 21.5 | 3.1 | 42.3 | 48.4 | 6.1 | ||