On 21/04/2014 02:44, Amy Price wrote:
> Hi Anoop,
>
> Hopefully someone more competent will help here but this is what I do:
>
> I don't do this everyday so I need to rely on great resources to refresh
>
> I have books by Stephen Senn which I like because they explain the whys
>
> http://www.senns.demon.co.uk/SIDD.html and
> http://www.senns.demon.co.uk/DICE.html
From the same author, I would add "Cross-over trials in clinical research"
http://books.google.it/books?id=MWbHzwpPTgEC
Very useful as it analyses different scenarios and gives examples for a
variety of statistical packages
cheers,
Piersante
> For simple explanations:
>
> And www.statisticshell.com/docs/ancova.pdf? and
> http://www.statisticshell.com/html/woodofsuicides.html
>
> Best
> Amy
>
>
>
> On 4/20/14 6:29 PM, "Anoop Balachandran" <[log in to unmask]> wrote:
>
>> Hi everyone,
>>
>> I have two randomized groups (exercise) in a pre-post design.
>>
>> I wanted to find out what is the best statistical analysis for such a
>> design. I just wanted to do a regular repeated measures ANOVa, but the
>> more I read, the more I get the feeling that ANCOVA is the best option
>> with pre-test as a covariate. My outcome measure at baseline is different
>> for each group ( not significant) , so I assume ANCOVA is a better
>> option. I am guessing the reason for ANCOVA is better statistical power
>> and for equalizing baseline scores.
>>
>> Does anyone have any information about it or any good books that might
>> help? I tried reading some relevant papers but just found it hard to
>> wrap around the full concept.
>>
>> Thank you so much
>> Anoop
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