| Keyword | CPC | PCC | Volume | Score | Length of keyword |
|---|---|---|---|---|---|
| retrospective sample size calculation | 0.11 | 0.7 | 4984 | 96 | 37 |
| retrospective | 0.34 | 0.7 | 4913 | 55 | 13 |
| sample | 0.8 | 0.9 | 7826 | 60 | 6 |
| size | 0.34 | 0.4 | 3584 | 67 | 4 |
| calculation | 0.01 | 0.4 | 1540 | 38 | 11 |
| Keyword | CPC | PCC | Volume | Score |
|---|---|---|---|---|
| retrospective sample size calculation | 0.97 | 0.2 | 4607 | 22 |
| retrospective study sample size calculation | 1.45 | 1 | 8382 | 57 |
| sample size calculator retrospective study | 1.39 | 0.5 | 1786 | 7 |
| sample size for retrospective study | 1.25 | 0.1 | 8029 | 99 |
| sample size for retrospective chart review | 1.43 | 0.2 | 6049 | 82 |
| sample size for retrospective cohort study | 1.56 | 0.7 | 582 | 79 |
| sample size calculation in research | 0.33 | 0.7 | 112 | 20 |
| sample size re-estimation | 0.58 | 0.6 | 8471 | 44 |
| sample size calculation for prospective study | 1.08 | 0.5 | 8540 | 31 |
| sampling method for retrospective study | 0.73 | 0.1 | 9328 | 4 |
| the sample size calculation | 0.78 | 0.6 | 2143 | 83 |
| sampling design for retrospective study | 1.42 | 0.5 | 4056 | 47 |
| estimation of sample size | 1.9 | 0.2 | 6399 | 2 |
| sample size estimation in research | 0.81 | 0.8 | 4649 | 68 |
| how to estimate sample size | 1.05 | 0.9 | 7889 | 49 |
| how to calculate sample size for research | 1.17 | 0.8 | 1596 | 37 |
| calculating sample size in research | 0.54 | 1 | 4039 | 77 |
