Terms and Synonyms Searched:
| Terms | Search Results* | Entire Database** |
|---|---|---|
| Synonyms | ||
| Pilot Study | 2,112 studies | 20,363 studies |
| Pilot Project | 86 studies | 522 studies |
| Study | 2,184 studies | 390,627 studies |
| Clinical Research | 51 studies | 17,741 studies |
| Pilot | 2,195 studies | 29,886 studies |
| Aviators | -- | 16 studies |
| Co Pilot | -- | 14 studies |
| depression | 2,197 studies | 30,826 studies |
| Depressive Disorders | 386 studies | 5,722 studies |
| Depressed | 184 studies | 2,447 studies |
| Low mood | 8 studies | 119 studies |
| Depressive illness | 7 studies | 104 studies |
| Depressive state | 5 studies | 80 studies |
| Feeling down | 4 studies | 51 studies |
| Depressivity | 2 studies | 18 studies |
| depressing | 2 studies | 36 studies |
| Decreased Mood | 1 studies | 4 studies |
| Miserable | 1 studies | 23 studies |
| Depressive neurosis | -- | 1 studies |
| Feeling blue | -- | 5 studies |
| melancholic | -- | 34 studies |
| Melancholy | -- | 9 studies |
| -- | No studies found |
| * | Number of studies in the search results containing the term or synonym |
| ** | Number of studies in the entire database containing the term or synonym |