repeated meassurement s-plus

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Article #192

#192

From: PL
Date: Sun, 09 Nov 2003 21:43

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Dear Newsgroup,

i have data of a clinical study were in a control group C and treatment
group T (factor group)

a parameter P is meassured a timepoint 0 and 12(factor time).

I now want to check if the change of P between 0 and 12 differs
significantly

in these two groups.

I was thinking of solving this problem with the following model in S-Plus
6.1:

aov(P ~ time:group + Error(subject),data=...)

where subject is the factor for the repeated meassured data(at timepoint 0
and 12).

my question:

is this the right model for repeated meassurement and

is it ok to just test the interaction of time and group,

or should i include the other factor into the model as well.

thanks in advance

Peter

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From: "PL" <kugu@chello.at>
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Subject: repeated meassurement s-plus
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