rsmul {relsurv}R Documentation

Fit Andersen et al Multiplicative Regression Model for Relative Survival

Description

Fits the Andersen et al multiplicative regression model in relative survival. An extension of the coxph function using relative survival.

Usage

rsmul(formula, data, ratetable = survexp.us, int,na.action,init,
      method,control,...)

Arguments

formula a formula object, with the response on the left of a ~ operator, and the terms on the right. The terms consist of predictor variables separated by the + operator, along with a ratetable term. The ratetable term matches each subject to his/her expected cohort. If the variables are organized and named in the same way as in the population tables, the ratetable term can be omitted. The response must be a survival object as returned by the Surv function. The time must be in days.
data a data.frame in which to interpret the variables named in the formula.
ratetable a table of event rates, such as survexp.us.
int the number of follow-up years used for calculating survival(the rest is censored). If missing, it is set the the maximum observed follow-up time.
na.action a missing-data filter function, applied to the model.frame, after any subset argument has been used. Default is options()$na.action.
init vector of initial values of the iteration. Default initial value is zero for all variables.
method the default method mul assumes hazard to be constant on yearly intervals. Method mul1 uses the ratetable to determine the time points when hazard changes. The mul1 method is therefore more accurate, but at the same time can be more computationally intensive.
control a list of parameters for controlling the fitting process. See the documentation for coxph.control for details.
... Other arguments will be passed to coxph.control.

Value

an object of class coxph.

References

Andersen, P.K., Borch-Johnsen, K., Deckert, T., Green, A., Hougaard, P., Keiding, N. and Kreiner, S. "A Cox regression model for relative mortality and its application to diabetes mellitus survival data.", Biometrics, 921-932, 1985.

See Also

rsadd, rstrans.

Examples

data(slopop)
data(rdata)
rsmul(Surv(time,cens)~sex+as.factor(agegr)+ratetable(age=age*365,
      sex=sex,year=year),ratetable=slopop,data=rdata)

[Package relsurv version 1.1-1 Index]