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Re: st: Need help programming for dates in Stata
From
Nick Cox <[email protected]>
To
[email protected]
Subject
Re: st: Need help programming for dates in Stata
Date
Tue, 5 Mar 2013 19:42:23 +0000
Nice.
Nick
On Tue, Mar 5, 2013 at 7:39 PM, Jeph Herrin <[email protected]> wrote:
>
> forv y=2009/2012 {
> gen used_`y'= inrange(`y',yofd(startdate),yofd(stopdate))
>
> }
>
>
>
> On 3/5/2013 1:43 PM, Michael Stewart wrote:
>>
>> Hi
>>
>> I have a list of start and stop dates for medications
>> I am trying to find if there is way to classify them to specifically
>> say if they are used in particular years
>>
>> Med Start date Stopdate
>> xxx 11/12/2009 11/12/2012
>> yyy . 1/2/2010
>> zzz 1/1/2009 .
>>
>>
>> I want to create four variables Used_2009 used_2010 used_2011
>> used_2012
>>
>> The criteria is
>> 1)If medication is used even for a day in a year, it is considered to
>> be used for that year
>> 2)If the start date is blank, then it is deemed to be used from a much
>> prior day
>> 3)If ending date is blank/missing then that medication is currently
>> active
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