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Title:MIXED MSEM

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Type of Tool SAS Macro
Title MIXED MSEM
Programmer/Email Yinglin Xia
Contributing Site Rochester
Description Rochester_MIXED_MSEM is a macro that models mediation analysis with two level nested data structures. For example, a longitudinal study has such a nested structure; with repeated assessments over time nested within each subject. If a cross-sectional study involves a limited number of providers, subjects treated by the same provider also have such a two-level nesting structure.
The macro uses SAS PROC MIXED procedure to model the estimates and uses Sobel (1982)ís approach to calculate the standard error and asymptotic confidence intervals
Example Example code
Classification Graph Type

References Sobel M. E. (1982). Asymptotic Confidence Intervals for Indirect Effects in Structural Equation Models. Sociological Methodology , Vol. 13, pp. 290-312.
Datasets Other
Data Rochester_MIXED_MSEM_simulated data
Software Program SAS
Software SAS Software SAS V9.2 or 9.3
Macro Parameters DSName = name of SAS dataset
DepVar = name of dependent variable
grp = name of group or between level variable
subj = name of individual or within level variable
M = name of mediation variable
X = name of independent variable
ddfm = name of method for computing denominator degrees
of freedom for the fixed effect. ddfm=bw for the between and within method,
for unbalanced data ddfm=satterhwaithe is often recommended, which is for
Satterhwaithe method
OutForm = when left empty, results will be shown in listing format under SAS 9.2, and
HTML format under SAS 9.3 in the output window screen. When set to HTML, PDF, or RTF, html, pdf, or rtf format will be created.
R-Code - Attachment

R-Code

SAS-Code - Attachment Rochester_MIXED_MSEM Main Macro.sas
SAS-Code SAS Example Code
Stata-Code - Attachment

Stata-Code

Other Code - Attachment

Other Code

Called Data Manipulation

Called Tool/Utility

Called Checking Macro

Called Other

Creation-Date

Revision-Date

Example Code SAS Example Code
Example Output SAS Example Output
SAS Examples

SAS_Example_Code Rochester_Mixed_MSEM_Example Code.sas
SAS_Example_Output Rochester_MIXED_MSEM_Example Output.pdf
R Examples

R_Example_Code

R_Example_Output

Stats Examples

Special Features

Special Features Attached

Special Features Text

Notes1-Legend Section with calls to needed macros
Notes1

Notes2-Legend Macro call with fully specified parameters
Notes2

Notes3-Legend Section with definitions of global macro parameters
Notes3

Notes4-Legend Section with definitions of local macro variables
Notes4

See Also

Checklists

Stat Tools Disclaimer The development of this macro was supported in part by CTSI pilot grant from the University of Rochester.
Discliamer The views expressed within CTSpedia are those of the author and must not be taken to represent policy or guidance on the behalf of any organization or institution with which the author is affiliated.
Permission Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, subject to the following conditions:

The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software.

THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF ERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT OLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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Topic revision: r9 - 06 Apr 2012 - 15:46:23 - MaryBanach
 

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