29 Nov
2012
29 Nov
'12
5:08 p.m.
Oh, sorry, if you want an interaction, then you would keep the age covariate and add a covariate which is age*severity, then test that covariate doug
On 11/29/2012 04:04 PM, Mahinda Yogarajah wrote:
Hi - sorry probably being slow - not sure i follow - treating them as one group (with appropriate covariate scale for level of endogenous factor/severity of disease) and using scaled age scores how would i look for an interaction between age and severity of disease across the group as both are treated as continuous covariates as opposed to discrete fixed factors.
Thanks
M
--
Douglas N. Greve, Ph.D.
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