| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| clinical trials register usa | 1.16 | 0.8 | 2594 | 72 | 28 |
| clinical | 1.39 | 0.1 | 1901 | 67 | 8 |
| trials | 0.47 | 0.5 | 381 | 22 | 6 |
| register | 1.34 | 0.5 | 2776 | 33 | 8 |
| usa | 1.36 | 1 | 1388 | 5 | 3 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| clinical trials register usa | 1.93 | 0.2 | 8969 | 83 |
