Exactly, this is it, thank you a lot!
Best regards
ziad
On 11/2/07, n j cox <[email protected]> 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
> [email protected]
>
> 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/
