If five consecutive years are multiplied, the resulting figure would be known as cumulative relative survival (CRS). It is analogous to the five-year overall survival rate, but it is a way of describing cancer-specific risk of death over five years after diagnosis. Software There are several software suites available to estimate relative survival rates. Regression modelling can be performed using maximum likelihood estimation methods by using Stata or R. For example, the R package cmprsk may be used for competing risk analyses which utilize sub-distribution or 'Fine and Gray' regression methods. See also Survival rate Five-year survival rate References Epidemiology Medical statistics