Table 2.
ROC areas of various topics
| Topic | Positives | Negatives | Medline Ranker | MScanner |
|---|---|---|---|---|
| Virus contamination in Europe | 28 | 24426 | 0.99977 | 0.9075 |
| Microarray and protein aggregation | 71 | 24689 | 0.99795 | 0.8724 |
| Radiology (10) | 53 | 47772 | 0.99748 | 0.9939 |
| Text mining | 312 | 24777 | 0.99601 | 0.9560 |
| Phosphorylation-dependent processes | 136 | 24572 | 0.99421 | 0.9867 |
| Systems biology and pathway | 407 | 24609 | 0.98812 | 0.9671 |
| Microarray and cancer | 8327 | 24592 | 0.97041 | 0.9889 |
| AIDSBio (10) | 4099 | 47746 | 0.94179 | 0.9910 |
| PG07 (10) | 1611 | 47758 | 0.90237 | 0.9754 |
MedlineRanker was compared to MScanner for various topics by the mean ROC area after 10-fold cross-validations (the two columns on the right). The same numbers of abstracts in the training set (positives) and in the background set (negatives) were used by both methods.