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# Re: st: survey analysis : three-way table and use of "subpop"

 From Steven Samuels <[email protected]> To [email protected] Subject Re: st: survey analysis : three-way table and use of "subpop" Date Wed, 21 Sep 2011 18:31:57 -0400

```One more time: make that "col"!

Steve

To get disease prevalence,  I should have added the "row" option to the -svy: tab- commands. This is corrected below.

S.

<redacted>-

Simplest is to use -svy: prop-

**************************************************
svy: prop Diseased, over(Age Gender Race)
*************************************************

The results list categories like _subpop_1, _subpop_2, but show a legend so that you know what is what.

If prevalence is low, a lower confidence interval endpoint could fall below zero. In that case, you should use four instances of -svy: tab-, because -svy: tab- computes confidence intervals for the logit of a proportion, then transforms back.

e.g.
******************************************************
svy, subpop(if Gender==0 & Race==0): tab Diseased Race, col
svy, subpop(if Gender==0 & Race==1): tab Diseased Race, col
etc.
******************************************************

Steve

On Sep 20, 2011, at 11:55 PM, <redacted> wrote:

Hi, I need help with svy analysis. I have 4 variables:

1) Diseased: yes=1 old=0
2) Gender: male=1 female=0
3) Age: young=1 old=0
4) Race: Malay=1 non-Malay=0

My svy command is :
Svyset ebid [weight=weight4], strata(strata) fpc(fpc)

Question:
I want to produce this table.  This table looks like a three-way table.

==============================================================
Prevalence	                          Prevalence
Male	                           Female
Malay	Mon malay	Malay	Non malay
Agegp

-young

-old

==============================================================

In a normal tabulate command, I can use "bysort gender: tabulate  race age"

but in svy command, how can I do this? Should I use “subpop” command,
one time for male and the other time for female? will that be valid?
Are there any other options?

Svy, subpop(?): tab race age diseased

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```