If you have 100 patients .
You have a treatment applicable to 20 of the 100 , and 20 % of those 20 are alive after 10 years , that 's only a 4 % absolute survival rate , not a 20 % survival rate .
If you have 100 patients and you have a treatment applicable to 20 of the 100 , and 20 % of those 20 are alive after 10 years , that 's only a 4 % absolute survival rate , not a 20 % survival rate .