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Comparison of survival time (month, ‾x ± s).
| Group | Progression-free survival time | Total survival time |
|---|---|---|
| Conventional radiotherapy group (n = 46) | 7.83 ± 1.64 | 14.85 ± 1.58 |
| CBCT group (n = 46) | 9.26 ± 1.37 | 20.28 ± 2.04 |
| t | −4.535 | −14.273 |
| P | ＜0.001 | ＜0.001 |
