[S] Additive risk function in Cox regresion

Victor Moreno (V.Moreno@ico.scs.es)
Fri, 13 Feb 1998 12:22:57 +0100

Has anyone used additive risk functions in Cox regression models with
Splus similar to the possibilities in BMDP 2L where

h(t,z) = ho(t)r(b,z)

multiplicative: r(b,z) = exp(bz) (default in coxph)
additive: r(b,z) = 1+bz


Victor Moreno
SERC Tel: 34-3- 260 78 12
Institut Catala d'Oncologia Fax: 34-3- 260 77 87
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