Table 7 Results of multivariate analysis of survival after salvage chemoradiotherapy
    Variables | Factors | Hazard rate (95% CI) | p-value |
|---|---|---|---|
Pre-chemoradiotherapy serum CA19-9 level (U/ml) | ≤ 1000 versus > 1000 | 1 | 0.009 |
| Â | Â | 4.38 (1.45-13.22) | Â |
Number of regimens of primary chemotherapy | 1 versus 2 | 1 | 0.004 |
| Â | Â | 6.28 (1.78-22.18) | Â |
Local progression before chemoradiotherapy | absent versus present | 1 | 0.6 |
| Â | Â | 1.58 (0.34-7.18) | Â |
Pre-chemoradiotherapy tumor diameter (cm) | ≤ 4.0 versus > 4.0 | 1 | 0.9 |
| Â | Â | 1.11 (0.35-3.46) | Â |