Statalist


[Date Prev][Date Next][Thread Prev][Thread Next][Date index][Thread index]

Re: st: Gen & replace


From   "Ziad El-Khatib" <Ziad.El-Khatib@ki.se>
To   statalist@hsphsun2.harvard.edu
Subject   Re: st: Gen & replace
Date   Fri, 2 Nov 2007 10:30:54 -0700

Exactly, this is it, thank you a lot!
Best regards
ziad


On 11/2/07, n j cox <n.j.cox@durham.ac.uk> wrote:
> I am sure that I understand this but
>
> drug3 != 0
>
> will evaluate as 1 whenever -drug3- is not 0.
>
> Thus you can count drugs by e.g.
>
> gen c345 = (drug3 != 0) + (drug4 != 0) + (drug5 != 0)
>
> Nick
> n.j.cox@durham.ac.uk
>
> Ziad El-Khatib
> --------------------------------------------------------------------------------
>
> I want to calculate sum of missed pills on 3 out of 5 drugs (drug1,
> drug2..drug5).
> Main drugs are drug1 and drug2, and the combination is either:
> adherence level of:
> drug1 + any 2 out of drug3,4,5
> or
> drug2 ?  any 2 out of drug3,4,5
>
> All of these drugs have value 0 when they were not used.
>
> i thought first to add them by typing
> gen drugsum = drug1+drug2+drug3+drug+4drug5
> I assume i will get total sum, but when i do ratio, STATA count with
> patients with dug value 0.
>
> Any tips how to exclude counting patients with drug value = 0?
>
> *
> *   For searches and help try:
> *   http://www.stata.com/support/faqs/res/findit.html
> *   http://www.stata.com/support/statalist/faq
> *   http://www.ats.ucla.edu/stat/stata/
>


-- 
Ziad El-Khatib
AIDS Unit
National Institute for Communicable Diseases (NICD)
1 Modderfontein Road
Private Bag X4, Sandringham, 2131
Johannesburg, South Africa
Mobile: +27 (0) 72-52 39 716
Phone: +27 (0) 11-386 6433
Fax (NICD): +27 (0)11 386 6453
Fax (alternative): +27 (0)866 18 2871
http://www.nicd.ac.za/

Division of International Health (IHCAR)
Karolinska Institutet
www.phs.ki.se/ihcar
*
*   For searches and help try:
*   http://www.stata.com/support/faqs/res/findit.html
*   http://www.stata.com/support/statalist/faq
*   http://www.ats.ucla.edu/stat/stata/



© Copyright 1996–2014 StataCorp LP   |   Terms of use   |   Privacy   |   Contact us   |   What's new   |   Site index