Table 3 Univariate Analysis; significant factors
From: Brachytherapy of stage II mobile tongue carcinoma. Prediction of local control and QOL
| Relapse free survival | Overall survival | Cervical metastasis free survival | |||||
|---|---|---|---|---|---|---|---|
| Variables | UHR | P value | UHR | P value | UHR | P value | |
| Growth pattern | |||||||
| Superficial vs. exophytic | 2.84 | <0.001 | 5.16 | 0.03 | 1.49 | 0.15 | |
| Superficial vs. invasive | 3.92 | <0.001 | 7.54 | 0.01 | 3.39 | <0.001 | |
| Tumor thickness (mm) | |||||||
| ≤5 vs. 6–10 | 1.76 | 0.19 | 2.08 | 0.15 | 2.87 | <0.001 | |
| ≤5 vs. 10–15 | 3.02 | 0.02 | 2.80 | 0.08 | 3.10 | <0.001 | |
| ≤5 vs. > 15 | 3.57 | <0.001 | 3.93 | 0.01 | 5.02 | <0.001 | |
| Brachytherapy source | |||||||
| 192Ir vs. 137Cs | 1.25 | 0.76 | 1.29 | 0.81 | 3.74 | <0.001 | |
| 192Ir vs. 226Ra | 0.81 | 0.52 | 1.22 | 0.61 | 1.23 | 0.33 | |
| Brachytherapy dose (Gy) | |||||||
| ≤70vs. > 70 | 1.24 | 0.54 | 1.24 | 0.61 | 1.03 | 0.91 | |
| UHR: unadjusted hazard ratio | |||||||