| very rarely | 3 | degree |
| repeatedly | 2 | degree |
| between elderly and younger patients | 2 | other |
| effect → be → observed | 23 |
| effect → be → measured | 8 |
| effect → be → studied | 6 |
| negative | neutral | positive |
| 0.138 | 0.681 | 0.182 |
| Raw frequency | 37 |
| Normalized frequency | 1.000 |
| Modifier score | 0.075 |
| Perplexity | 22.409 |