Table 1 Literature review summary of used corpora
From: Combination of conditional random field with a rule based method in the extraction of PICO elements
Reference | Training Corpus | Testing Corpus |
|---|---|---|
[8] | 275 Manual and mixed | 358 Mixed |
[10] | 148 Manual and mixed | 75 Mixed |
[13] | 50 Manual and mixed | 156 Mixed |
[12] | 800 Manual and mixed | 200 Mixed |
1000 Manual and mixed | 200 Mixed | |
[9] | 1575 to 2280 Automatic and only structured abstracts | 318 Mixed |
2394 to 14,279 Automatic and only structured abstracts | 2394 to 14,279 Only structured |