| for amputation | 6 | purpose |
| for additional surgery | 6 | purpose |
| for either a root canal | 5 | purpose |
| infection → result in → the need | 10 |
| infection → lead to → the need | 8 |
| infection → prompt → the need | 3 |
| negative | neutral | positive |
| 0.835 | 0.157 | 0.008 |
| Raw frequency | 21 |
| Normalized frequency | 0.320 |
| Modifier score | 0.600 |
| Perplexity | 126.238 |