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alldpinfe
2006 Mar 07
1
breslow estimator for cumulative hazard function
...ow estimator for the baseline cumulative
hazard function (H(t)) in each stratum. As far as i know, if the
proportionality assumption holds, the plot of ln[H(t)] of each stratum
versus time should be approximately parallel.
i.e
fit<-coxph(Surv(start,end,status)~sx+rated+AGLEVEL+strata(Z1),data=ALLDPinfectionandbronchitis)
ss<-survfit(fit)
plot(ss,fun="cumhaz")
My question is on whether the cumulative hazard given by the above command
is actually a breslow estimator for baseline cumulative hazard ,i.e,
estimator=sum( number of death/ (sum(risk score in risk set)) or a
nelson-Aale...