No of 5-year relative S.E. % of lost Median
  patients survival rate     (months)
Total 2658 32.55 2.61 15.73 30.69
1-2 st.treated 594 51.2 6.44 27.44
1-2 st.not treated 325 42.58 8.83 24 48.63
3 st. treated 524 39.25 6.14 15.46 44.19
3 st.not treated 360 30.44 7.08 13.06 29.12
4 st.treated 243 18.7 6.34 5.35 19.59
4 st.not treated 386 5.83 3.06 3.37 3.26