| really | 6 | degree |
| for people | 6 | transitive-object |
| for patients with back pain | 2 | transitive-object |
| referral → be → valuable | 10 |
| referral → be → beneficial | 9 |
| referral → be → useful | 4 |
| referral → be → invaluable | 3 |
| negative | neutral | positive |
| 0.058 | 0.392 | 0.550 |
| Raw frequency | 26 |
| Normalized frequency | 0.408 |
| Modifier score | 1.000 |
| Perplexity | 64.153 |