Table 3 Area under the curve and 95% confidence intervals for the estimated versus observed survival in the whole patient group (n = 183) and in patients with squamous cell carcinoma (n = 154)

1-year

0.744 [0.633–0.855]

0.806 [0.669–0.943]

0.807 [0.690–0.925]

3-year

0.710 [0.617–0.802]

0.779 [0.678–0.881]

0.762 [0.670–0.854]

5-year

0.684 [0.595–0.774]

0.702 [0.606–0.798]

0.650 [0.562–0.737]

Squamous cell carcinoma (SCC) (n = 154)

1-year

0.762 [0.636–0.887]

0.840 [0.722–0.958]

0.836 [0.744–0.928]

3-year

0.736 [0.635–0.836]

0.793 [0.679–0.906]

0.773 [0.677–0.868]

5-year

0.734 [0.643–0.825]

0.759 [0.658–0.859]

0.680 [0.586–0.774]