Table 1.
MeSH descriptors in the evaluation collection, and their citations frequencies in the training set
| Descriptor | Frequency | Descriptor | Frequency |
|---|---|---|---|
| Humans | 66612 | Disease models, Animal | 2203 |
| Male | 39007 | Rats, Sprague-Dawley | 2160 |
| Female | 38793 | Sensitivity and specificity | 2155 |
| Animals | 25529 | Cell proliferation | 2124 |
| Adult | 21471 | Biological markers | 2088 |
| Middle aged | 20867 | Cohort studies | 2072 |
| Young adult | 9512 | Risk assessment | 2049 |
| Adolescent | 8869 | Brain | 2035 |
| Mice | 7980 | Mutation | 2025 |
| Treatment outcome | 6749 | Mice, Inbred C57BL | 2005 |
| Aged, 80 and over | 6015 | Cell line | 1947 |
| Child | 5759 | Apoptosis | 1901 |
| Rats | 5610 | Infant, Newborn | 1865 |
| Risk factors | 4896 | Tomography, X-Ray computed | 1862 |
| Prospective studies | 3178 | RNA, Messenger | 1843 |
| Questionnaires | 3064 | Age factors | 1763 |
| Signal transduction | 2925 | Algorithms | 1698 |
| Cell line, Tumor | 2911 | Models, Molecular | 1692 |
| Molecular sequence data | 2695 | Antineoplastic agents | 1681 |
| Pregnancy | 2672 | Gene expression regulation | 1669 |
| Infant | 2551 | Dose-response relationship, Drug | 1627 |
| Magnetic resonance imaging | 2545 | Amino acid sequence | 1625 |
| Cells, Cultured | 2451 | Genotype | 1561 |
| Prognosis | 2450 | Neoplasms | 1521 |
| Case-Control studies | 2383 | Phylogeny | 1518 |