| Overall survival rate |  | ||
---|---|---|---|---|
Clinical stage | 1-y | 2-y | 3-y | p value |
 I | 92.5 % | 78.0 % | 67.6 % |  |
 II | 73.9 % | 64.5 % | 53.9 % |  |
 III | 63.2 % | 46.6 % | 33.3 % |  |
 IV | 54.8 % | 30.6 % | 23.5 % |  |
Clinical T stage | Â | Â | Â | <0.0001 |
 cT1 | 87.2 % | 75.4 % | 67.5 % |  |
 cT2 | 77.7 % | 67.6 % | 59.1 % |  |
 cT3 | 65.0 % | 48.2 % | 35.7 % |  |
cT4 | 52.9 % | 25.0 % | 15.1 % | Â |
Age (years old) | Â | Â | Â | 0.049 |
 > 70 | 60.5 % | 44.4 % | 34.6 % |  |
 < 70 | 72.9 % | 55.8 % | 45.4 % |  |
Cycles of chemotherapy | Â | Â | Â | 0.0004 |
 One | 43.2 % | 29.3 % | 17.6 % |  |
 Two | 67.5 % | 51.3 % | 41.8 % |  |
 Three | 79.2 % | 66.7 % | 53.5 % |  |
 Four | 77.1 % | 56.7 % | 49.3 % |  |