Table 3.
Univariate Analysis of the Relationship of Clinical and Treatment-Related Factors With OS and LRPFS.
| Factors | Comparison | P-value | |
|---|---|---|---|
| OS | LRPFS | ||
| Clinical factors | |||
| Sex | Male vs female | 0.689 | 0.594 |
| Age | ≤ 40 years vs > 40 years | 0.361 | 0.681 |
| Smoking history | Never vs ever | 0.184 | 0.575 |
| Histologic type | SCC vs ACC | 0.001 | <0.001 |
| Location | Cervical vs thoracic | 0.170 | 0.056 |
| Tumor size | ≤ 4 cm vs > 4 cm | 0.102 | 0.389 |
| Extension | Yes vs no | 0.545 | 0.608 |
| Treatment-related factors | |||
| Surgical resection | Yes vs No | 0.823 | 0.013 |
| RT type | PORT vs definitive RT | 0.324 | 0.038 |
| RT technique | 3DCRT/IMRT vs 2D-RT | 0.193 | 0.062 |
| Chemotherapy | Yes vs No | 0.543 | 0.189 |
| Tumor response | CR vs PR | 0.160 | 0.205 |
Abbreviations: SCC, squamous cell carcinoma; ACC, adenoid cystic carcinoma; RT, radiotherapy, PORT, post-operative radiotherapy; 2DRT, 2-dimensional radiotherapy; 3DCRT, 3-dimensional conformal radiotherapy; IMRT, intensity-modulated radiotherapy; OS, overall survival; LRPFS, locoregional progression free survival.