No of 5-year relative S.E. % of lost Median
  patients survival rate     (months)
Total 4217 62.06 1.73 26.51
1-2 st.treated 2499 80.82 2.02 32.77
1-2 st.not treated 459 56.02 5.58 31.81
3 st. treated 475 46.55 5.12 19.16 49.17
3 st.not treated 161 15.59 6.78 9.32 9.76
4 st.treated 153 16.91 6.54 9.15 8.01
4 st.not treated 296 2.7 2.3 2.03 2.39