Table 3 Results of multivariate analysis of risk factors for EF
Characteristics | OR | 95%CI | P-value |
|---|---|---|---|
Age (years) | |||
<70 | 1 | ||
≧70 | 0.170 | 0.030–0.951 | 0.044 |
T stage | |||
Non-T4 | 1 | ||
T4 | 8.369 | 1.729–40.522 | 0.008 |
The BED in re-RT | 1.063 | 0.918–1.231 | 0.416 |
The total BED | 0.986 | 0.881–1.102 | 0.798 |
Hyperfractionated RT in re-RT | |||
No | 1 | ||
Yes | 0.091 | 0.006–1.417 | 0.087 |
Ulcerative EC | |||
No | 1 | ||
Yes | 5.810 | 1.316–25.650 | 0.020 |
The length of tumor (cm) | 1.138 | 0.818–1.585 | 0.443 |
The maximum thickness of tumor (mm) | 1.314 | 1.098–1.572 | 0.003 |