Table 4.
Univariate and Multivariate Analyses for Pelvic Failure-Free Survival
| Prognostic Factor | Group | PFFS (%) | Univariate | Multivariate | RR | 95% CI |
|---|---|---|---|---|---|---|
| Age (years) | < 57 | 73 | 0.531 | − | ||
| ≥ 57 | 77 | |||||
| Duke stage | A or B | 88 | 0.399 | − | ||
| C | 64 | |||||
| Rectal lateral margin | negative | 73 | 0.045 | 0.05 | 2.6 | 1.0-6.6 |
| positive | 51 | |||||
| Initial CEA (ng/ml) | < 100 | 67 | 0.694 | − | ||
| ≥ 100 | 73 | |||||
| Adjuvant pelvic RT | no | 65 | 0.028 | 0.04 | 0.3 | 0.1-0.9 |
| yes | 81 |
Abbreviations: CEA = carcinoembryonic antigen; PFFS = pelvic failure free survival; RR = relative risk; CI = confidence interval