Table 4.
Kaplan Meier analysis for local control
| Variables | 5‐year local control rate (%) | P‐value |
|---|---|---|
| Age at RT, years | 0.906 | |
| <70 | 79% | |
| ≥70 | 81% | |
| Patient sex | 0.149 | |
| Female | 71% | |
| Male | 100% | |
| Histology | 0.615 | |
| SCC | 77% | |
| Other | 86% | |
| Chemotherapy | 0.142 | |
| No | 68% | |
| Yes | 89% | |
| RT type | 0.715 | |
| Proton | 81% | |
| Photon | 75% | |
| RT fractionation | 0.286 | |
| Standard fractionation | 74% | |
| SBRT | 100% | |
| IgG response | 0.921 | |
| Absent | 79% | |
| Present | 83% | |
| IgM response | 0.340 | |
| Absent | 89% | |
| Present | 71% | |
| IgG or IgM response | 0.699 | |
| Absent | 83% | |
| Present | 77% |
RT, radiation therapy; SBRT, stereotactic body radiation therapy; SCC, squamous cell carcinoma.