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mht
2001 Sep 18
1
case weights in coxph (survival)
...formula = jtree9$cph.call, data = z, weights = rep(1, dim(z)[1]))
coef exp(coef) se(coef) z p
SM 0.2574 1.294 0.0786 3.274 1.1e-03
Sex -0.1283 0.880 0.1809 -0.709 4.8e-01
RACE -0.3226 0.724 0.0817 -3.950 7.8e-05
MHHT:MHDM 0.0524 1.054 0.0574 0.913 3.6e-01
FHHT:FHCAD:FHDM 0.0361 1.037 0.0412 0.877 3.8e-01
Likelihood ratio test=43.8 on 5 df, p=2.55e-08 n= 646
but
> coxph(jtree9$cph.call,z,rep(1,dim(z)[1]))$weights
NULL
while the documentation says that a coxph object should have a...