| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| nih clinical trial registration | 0.54 | 1 | 2522 | 83 | 31 |
| nih | 1.27 | 0.4 | 9731 | 41 | 3 |
| clinical | 0.25 | 0.9 | 2337 | 54 | 8 |
| trial | 0.25 | 0.5 | 9028 | 4 | 5 |
| registration | 1.39 | 0.4 | 9937 | 55 | 12 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| nih clinical trial registration | 1.15 | 0.8 | 2376 | 97 |
