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Re: st: repeated measures


From   Michael Eisenberg <meisenberg713@gmail.com>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: repeated measures
Date   Wed, 8 Sep 2010 09:22:32 -0500

Thanks to all for your help.

On Tue, Sep 7, 2010 at 4:21 PM, Nick Cox <n.j.cox@durham.ac.uk> wrote:
> Perhaps. But David Bell's suggestion of -collapse- I think trumps all other suggestions.
>
> Nick
> n.j.cox@durham.ac.uk
>
> Michael McCulloch
>
> Thanks Nick, you're correct I did misread that part.
> Nevertheless, I suspect that some of the complexity you allude to your
> your prior reply to Michael E. is that he wishes to selectively carry
> forward certain field values. For example, something like:
>        replace the missing value from (first visit at which it's available )
> if that value is present in that patient's first visit
> I would know how to define the first visit a patient had, but not how
> to find the first visit at which a lab value appeared.
>
> On Sep 7, 2010, at 1:12 PM, Nick Cox wrote:
>
>> I think Michael M. is misreading this. It's a long to long mapping,
>> so -reshape- does not spring to mind here. See my earlier suggestions.
>
> Michael McCulloch
>
>> This is possible with the -reshape- command. What you are starting
>> with is the "long" data format, and you can use that command to change
>> to "wide." However, there appear to be a few problems with your
>> description:
>> 1. Did you mean patient ID=4, not =3, in the last line of the data
>> format you're seeking?
>> 2. In the desired data format you list the "glu" data point for
>> subject ID=3 as being from a different date than the original 6/1/09.
>>
>> On Sep 7, 2010, at 12:54 PM, Michael Eisenberg wrote:
>>
>>> I have a problem I hope you can help with that involves cleaning a
>>> dataset for analysis.
>>>
>
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