Table 1 Variables and Relative Classes for 277 patients treated with linear sources
From: Brachytherapy of stage II mobile tongue carcinoma. Prediction of local control and QOL
| Variables | Classes | No. | % |
|---|---|---|---|
| Sex | Male | 169 | 61 |
| Female | 108 | 39 | |
| Age at diagnosis (yrs) | ≤60 | 174 | 63 |
| > 60 | 103 | 37 | |
| Growth pattern | Superficial | 81 | 29 |
| Exophytic | 121 | 44 | |
| Invasive | 75 | 27 | |
| Site | Side | 254 | 92 |
| Tip | 1 | 0 | |
| Lower | 20 | 7 | |
| Upper | 2 | 1 | |
| Leukoplakia | Absent | 67 | 24 |
| Present | 210 | 76 | |
| Tumor thickness (mm) | ≤5 | 106 | 38 |
| 6–10 | 97 | 35 | |
| 11–15 | 40 | 14 | |
| > 15 | 34 | 12 | |
| Maximum diameter (mm) | ≤30 | 196 | 71 |
| > 30 | 81 | 29 | |
| Brachytherapy source | 192Ir hairpin | 104 | 38 |
| 226Ra needle | 162 | 58 | |
| 137Cs needle | 11 | 4 | |
| Brachytherapy dose (Gy) | ≤70 | 216 | 78 |
| > 70 | 61 | 22 | |
| Brachytherapy plane | Single | 242 | 87 |
| Double | 32 | 12 | |
| Volume | 3 | 1 | |
| External irradiation | + | 45 | 16 |
| - | 232 | 84 |