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Re: st: Multiple mean comparisons with complex survey design


From   Richard Williams <Richard.A.Williams.5@ND.edu>
To   statalist@hsphsun2.harvard.edu, <statalist@hsphsun2.harvard.edu>
Subject   Re: st: Multiple mean comparisons with complex survey design
Date   Tue, 19 Feb 2008 15:08:53 -0500

At 02:28 PM 2/19/2008, Sven Klingemann wrote:
Hi,

I would like to compare means across six groups and adjust the significance
test accordingly. I noticed that the "mtest" command (and associated
Bonferroni option) is not allowed after the svy:mean command. Is there any
recommended alternative for multiple group comparisons using a complex
survey design?

Thank you!
At the risk of being accused of plagiarizing someone else's words - Yes You Can :). Example:

. webuse nhanes2f, clear

. svy: mean health, over(race)
(running mean on estimation sample)

Survey: Mean estimation

Number of strata = 31 Number of obs = 10335
Number of PSUs = 62 Population size = 1.2e+08
Design df = 31

White: race = White
Black: race = Black
Other: race = Other

--------------------------------------------------------------
| Linearized
Over | Mean Std. Err. [95% Conf. Interval]
-------------+------------------------------------------------
health |
White | 3.663833 .0252884 3.612257 3.715409
Black | 3.117221 .0379095 3.039904 3.194538
Other | 3.510359 .080302 3.346582 3.674136
--------------------------------------------------------------

. test [#1]White = [#1]Black = [#1]Other, mtest(b)

Adjusted Wald test

( 1) [health]White - [health]Black = 0
( 2) [health]White - [health]Other = 0

---------------------------------------
| F(df,30) df p
-------+-------------------------------
(1) | 141.48 1 0.0000 #
(2) | 3.65 1 0.1304 #
-------+-------------------------------
all | 69.05 2 0.0000
---------------------------------------
# Bonferroni adjusted p-values




-------------------------------------------
Richard Williams, Notre Dame Dept of Sociology
OFFICE: (574)631-6668, (574)631-6463
HOME: (574)289-5227
EMAIL: Richard.A.Williams.5@ND.Edu
WWW: http://www.nd.edu/~rwilliam

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