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# RE: st: Analysis admissions after liver transplant

 From "Dudekula, Anwar" To "statalist@hsphsun2.harvard.edu" Subject RE: st: Analysis admissions after liver transplant Date Tue, 3 Jan 2012 17:44:47 +0000

```Hi Matt,

I am sorry to post  this basic question .

But how does this logic that you wrote work

1)(generate firsttransplant = year + (real(substr(quarter, 2, 1)) - 1) /4 if livertransplant == "yes"
2)bysort pseudoid (firsttransplant): replace firsttransplant = firsttransplant[1]
3)keep if year + (real(substr(quarter, 2, 1)) - 1) / 4 > firsttransplant

Thank you,
Yours Sincerely,
Anwar Dudekula

________________________________________
From: owner-statalist@hsphsun2.harvard.edu [owner-statalist@hsphsun2.harvard.edu] on behalf of Matthew White [mwhite@poverty-action.org]
Sent: Monday, December 19, 2011 8:34 PM
To: statalist@hsphsun2.harvard.edu
Subject: Re: st: Analysis admissions after liver transplant

Hi Anwar,

generate firsttransplant = year + (real(substr(quarter, 2, 1)) - 1) /
4 if livertransplant == "yes"
bysort pseudoid (firsttransplant): replace firsttransplant = firsttransplant[1]
keep if year + (real(substr(quarter, 2, 1)) - 1) / 4 > firsttransplant

Best,
Matt

On Mon, Dec 19, 2011 at 12:25 PM, Dudekula, Anwar <dudekulaan@upmc.edu> wrote:
> Hi,
>
> I am here with posting a de-identified data for patients with liver transplant
>
> --The patients  with liver disease get admitted multiple times to the hospital.During one of the admission, they get liver transplant based on their degree of sickness.They can get re-admitted to the hospital after liver transplant for  complications related to transplant.To explore this issues, we want to evaluate the admissions after they get the liver transplant
>
> --For example  patient with pseudoid-1 gets liver transplant in 4th quarter .That patient gets admitted three times subsequently but patient with pseudiid-9 gets liver transplant during second admission and has three successive admissions after that
>
> --So I want to pick up the observations after the liver transplant( eventhough they may not get a liver transplant during that admission)
>
>
> The data contains
> --pseudoid, whcih is unique for the patient
> --sysid is unique for each quarter of a year
> --Q1,Q2,Q3,Q4 are 4 quarters of the year
>
>
>
>        pseudoid     sysid   year    quarter     livertransplant |
>     |------------------------------------------------------------|
>  1. | pseudoid-1   0220890   2008         Q4    yes              |
>  2. | pseudoid-1   0229499   2009         Q2    no           |
>  3. | pseudoid-1   0234526   2009         Q3    no               |
>  4. | pseudoid-2   0234997   2010         Q2    no               |
>  5. | pseudoid-3   0248508   2008         Q1   yes               |
>     |------------------------------------------------------------|
>  6. | pseudoid-4   0227009   2008         Q2   no                |
>  7. | pseudoid-4   0483263   2008         Q3   yes               |
>  8. | pseudoid-5   0483419   2008         Q2   no                |
>  9. | pseudoid-6   0228531   2008         Q1   yes               |
>  10. | pseudoid-7   0227324   2009         Q3   no                |
>     |------------------------------------------------------------|
>  11. | pseudoid-9   0227325   2008         Q1   no                |
>  12. | pseudoid-9   0227326   2008         Q2   yes               |
>  13. | pseudoid-9   0227327   2008         Q3   no                |
>  14. | pseudoid-9   0482471   2008         Q4   no                |
>  15. | pseudoid-9  0231492    2009         Q2   no                |
>
>
>
>
> Yours sincerely
> Anwar
> *
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--
Matthew White
Data Coordinator
Innovations for Poverty Action
101 Whitney Avenue, New Haven, CT 06510 USA
+1 434-305-9861
www.poverty-action.org

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```