Table 3.
The results of log-rank tests for OS and PFS.
| Category | Variables | P-value for OS | P-value for PFS |
|---|---|---|---|
| Age, years | >71 vs. ≤71 | 0.62 | 0.65 |
| Sex | Male vs. Female | 0.86 | 0.19 |
| ECOG PS | 0 vs. 1–2 | 0.37 | 0.08 |
| Charlson comorbidity index | 0–2 vs. 3–5 | 0.98 | 0.95 |
| History of renal surgery for kidney cancer | Yes vs. No | 0.19 | 0.35 |
| HD before SBRT | Yes vs. No | 0.66 | 0.88 |
| Operability | Operable vs. Inoperable | 0.15 | 0.21 |
| Irradiated tumor diameter, mm | >26 vs. ≤26 | 0.32 | 0.58 |
| Initial response to SBRT | SD vs. PR | 0.75 | 0.12 |
Abbreviations: OS, overall survival; PFS, progression-free survival; ECOG, Eastern Cooperative Oncology Group; PS, performance status; HD, hemodialysis; SBRT, stereotactic body radiotherapy.