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Title: Effect Size Longitudinal

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Type of Tool SAS Macro
Title Effect Size Longitudinal
Programmer/Email RuiChen
Contributing Site Rochester
Description This macro computes effect sizes for longitudinal study data; it compares the group means between two treatment conditions with adjustment for baseline value of the outcome and covariates and prints out effect size estimates at each assessment time as well as averaged effect size over all assessment points.
Effect size is defined as Cohen's D for comparing two treatment groups --- difference between two group means divided by the pooled standard deviation --- with the group means and variance estimated from an analysis of covariance (ANCOVA) model. The confidence interval of effect size at each time is based on the asymptotic variance of the effect size estimate, while the confidence interval of averaged effect size is the averaged confidence intervals across all assessment times.
Classification Graph Type

References

Datasets

Data

Software Program SAS
Software SAS
Macro Parameters MacroDir: Directory where the results are saved.
DSName: Name of SAS data set.
ID: Name of the variable for object ID.
Outcome: Name of outcome variable.
TimeSeq: Name of the time sequences variable. If the data is not longitudinal, leave it blank.
Treatment: Name of the variable to specify two cohorts.
CovariateNum: Name of the continuous covariates.
CovariateClass: Name of the categorical covariates.
AdjustTimeBase:
- Y/N (default = N): If adjust for the value of Outcome at TimeSeq? = 0.
- Y: adjust for the value of outcome variable at TimeSeq? = 0; when AdjustTimeBase? = Y, the value of TimeSeq? starts from 0.
- N: do not adjust for the value of outcome variable at time 0.
ResultsFormat: rtf/html (default = rtf): Format of the results file.
R-Code - Attachment

R-Code

SAS-Code - Attachment Rochester_Effect Size_Main Macro
SAS-Code

Stata-Code - Attachment

Stata-Code

Other Code - Attachment

Other Code

Called Data Manipulation

Called Tool/Utility

Called Checking Macro

Called Other Rochester_Longitudinal Effect Size_Main Macro
Creation-Date December 4, 2008
Revision-Date

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

SAS_Example_Code Rochester_ES Macro_SAS Example Code
SAS_Example_Output [Rochester_ES Macro_SAS Example Output
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 Section with Calls to needed macros
filename ESMacro URL "https://www.ctspedia.org/wiki/pub/CTSpedia/EffectSizeLongitudinal/ESMacro.sas";
%include ESMacro;


Notes2-Legend Macro call with fully specified parameters
Notes2 Macro call with fully specified parameters
%ESMacro (MacroDir= , DSName = , ID=, Outcome=, TimeSeq= , Treatment = , CovariateNum , CovariateClass, AdjustTimeBase= N, ResultsFormat= rtf);
Notes3-Legend Section with definitions of global macro parameters
Notes3 N/A
Notes4-Legend Section with definitions of local macro variables
Notes4 N/A
See Also Rochester_Effect Size Mixed_Main Macro
Checklists

Stat Tools Disclaimer This SAS macro is developed by Rui Chen and other members in the Department of Biostatistics and Computational Biology at the University of Rochester under the auspice of the CTSA BERD with the intent to facilitate data analyses and reporting in clinical and related research. It is copyrighted by Dr. Chen, October, 2008 and distributed for free public access.
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.
Reference Image

Topic revision: r14 - 06 Apr 2012 - 15:23:08 - MaryBanach
 

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