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Re: st: RE: date calculation
From
Nick Cox <[email protected]>
To
"[email protected]" <[email protected]>
Subject
Re: st: RE: date calculation
Date
Mon, 10 Mar 2014 20:00:54 +0000
I see the similarity now!
If one date is monthly and the other daily, convert the daily to
monthly and calculate the difference in months. Completed years are
then floor(months/12). More precision is likely to be spurious.
Nick
[email protected]
On 10 March 2014 19:58, Nick Cox <[email protected]> wrote:
> That question looks different to me.
>
> Nick
> [email protected]
>
>
> On 10 March 2014 19:52, Joe Canner <[email protected]> wrote:
>> Matthew,
>>
>> I think you asked more or less the same question a few months ago: http://www.stata.com/statalist/archive/2013-10/msg00662.html
>>
>> At any rate, the answers given at that time should help answer this question.
>>
>> Regards,
>> Joe Canner
>> Johns Hopkins University School of Medicine
>>
>> -----Original Message-----
>> From: [email protected] [mailto:[email protected]] On Behalf Of DeMichele, Matthew
>> Sent: Monday, March 10, 2014 3:39 PM
>> To: [email protected]
>> Subject: st: date calculation
>>
>> I have two date variables arranged as YYYYMM and YYYYYMMDD. The first
>> variable is date of birth and the second is date of admission to
>> treatment. I am trying to calculate age_at_admission, but am running
>> into trouble. Is this a possible calculation since Stata calculates
>> dates as days since 1,1,1960?
>>
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