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2008 Jul 15
0
implementation of Prentice method in cch()
...t[cc==2]-eps fit1 <- coxph(Surv(ent2,texit,cens)~X,eps=eps,x=TRUE) ## Calculate Prentice estimate and variance nd <- sum(cens) # Number of failures nc <- sum(subcoh) # Number in subcohort ncd <- sum(cc==1) #Number of failures in subcohort X <- as.matrix(X) aent <- c(tenter[cc>0],tenter[cc<2]) aexit <- c(texit[cc>0],texit[cc<2]) aX <- rbind(as.matrix(X[cc>0,]),as.matrix(X[cc<2,])) aid <- c(id[cc>0],id[cc<2]) dum <- rep(-100,nd) dum <- c(dum,rep(0,nc)) gp <- rep(1,nd) gp <- c(gp,rep...