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tp3656397p3656397
2011 Jul 10
1
Package "survival" --- Difference of coxph strata with subset?
...age, data = ovarian, subset = rx
== 1)
coxph(formula = Surv(futime, fustat) ~ age, data = ovarian, subset = rx
== 2)
May I know the difference of these issue? Many thanks...
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