TABLE 2.
Univariate analysis of local control and overall survival rates
| No. of patients | Local control | Overall survival | ||||
|---|---|---|---|---|---|---|
| 9‐year (%) | P‐value | 9‐year (%) | P‐value | |||
| Sex | Male | 18 | 71.1 | .907 | 72.4 | .503 |
| Female | 16 | 80.8 | 83.1 | |||
| Age (years) | >52 | 17 | 94.1 | .195 | 74.3 | .401 |
| ≤52 | 17 | 59.6 | 79 | |||
| Performance status | 0 | 12 | 72.9 | .158 | 88.9 | .598 |
| 1 | 18 | 75.7 | 78.3 | |||
| 2 | 4 | 100 | 50 | |||
| Tumor status | Recurrence | 7 | 85.7 | .646 | 85.7 | .005 |
| Residual tumor | 22 | 73.7 | 87.1 | |||
| Naïve tumor | 5 | 75 | n.a. | |||
| Eye symptom | Yes | 20 | 81.6 | .097 | 82.2 | .346 |
| No | 14 | 53 | 68.6 | |||
| GTV (cc) | >34.7 | 9 | 26.7 | .001 | 38.1 | .022 |
| ≤34.7 | 25 | 85.7 | 90.4 | |||
| D1cc (Gy [RBE]) | >58.9 | 15 | 64 | .895 | 100 | .017 |
| ≤58.9 | 19 | 71.8 | 64.4 | |||
Abbreviations: CI, confidence interval; D1cc, minimum dose received by the maximally irradiated 1 cc volume of the GTV; GTV, gross tumor volume; RBE, relative biological effectiveness.