Hi,
Is it normal to get intercept in the list of covariates in the output of
survreg function with standard error, z, p.value etc? Does it mean that
intercept was fitted with the covariates? Does Value column represent
coefficients or some thing else?
Regards,
-------------------------------------------------
tmp = survreg(Surv(futime, fustat) ~ ecog.ps + rx, ovarian,
dist='weibull',scale=1)
> summary(tmp)
Call:
survreg(formula = Surv(futime, fustat) ~ ecog.ps + rx, data = ovarian,
dist = "weibull", scale = 1)
Value Std. Error z p
(Intercept) 6.962 1.322 5.267 1.39e-07
ecog.ps -0.433 0.587 -0.738 4.61e-01
rx 0.582 0.587 0.991 3.22e-01
Scale fixed at 1
Weibull distribution
Loglik(model)= -97.2 Loglik(intercept only)= -98
Chisq= 1.67 on 2 degrees of freedom, p= 0.43
Number of Newton-Raphson Iterations: 4
n= 26
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