| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| case control nejm | 0.73 | 0.3 | 5887 | 58 | 17 |
| case | 0.22 | 0.3 | 8654 | 77 | 4 |
| control | 0.86 | 1 | 653 | 95 | 7 |
| nejm | 1.76 | 0.6 | 6633 | 75 | 4 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| case control nejm | 1.03 | 0.6 | 7752 | 64 |
| case control nested in cohort study | 1.75 | 0.5 | 5526 | 9 |
| nested case control vs case cohort study | 0.82 | 0.2 | 1568 | 56 |
