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Comparison of treatments in different age groups.
| Groups | Case number | Treatments | |||
|---|---|---|---|---|---|
| Anterior surgery | Posterior surgery | Anterior-posterior approach surgery | Conservative treatment | ||
| The young group | 85 | 12 | 41 | 3 | 29 |
| The middle-aged group | 91 | 9 | 29 | 2 | 51 |
| The elderly group | 40 | 3 | 22 | 0 | 15 |
| χ2 value | – | 10.045 | |||
| P value | – | .007 | |||
