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Title: ZIP GEE

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Type of Tool SAS Macro
Title ZIP GEE
Programmer/Email Rui Chen
Contributing Site Rochester
Description Rochester_GEEZIP is a macro that models overdispersion with structural zero data within a longitudinal data setting. The macro uses a distribution-free approach through generalized estimating equations to estimate effects of continuous covariates developed by Yu et al (2010). The asymptotic variances for parameter estimates are also computed. Itís suggested to be used in conjunction with ZIP Check Fit macro, which examines whether preponderance of zeros of count data is present (see details Rochester_ZIP_Check_Fit).
Example Example Code
Classification Graph Type

References Yu, Q., Tang, W., Chen, R., He, H., Gallop, R., Crits-Christoph, P. and Tu, X.M. (2010). Distribution-free Inference of Negative and Zero-inflated Poisson for Longitudinal Data, under revision for Statistics in Medicine
Datasets Other
Data Simulated Dataset: Rochester_GEEZIP_simulated data
Software Program SAS
Software SAS V9.2
Macro Parameters DSName = name of a SAS longitudinal dataset
Outcome = name of outcome variable. This variable is a count variable
PredictNum = list of numeric predictor variables, these variables are continuous.
ID = name of unique id for each subject
Time = variable indicating time of the ourcome and predictor variables to be observed
OutForm = if left empty, results are only shown in the output window in the screen; if HTML, a html file of the output is generated
R-Code - Attachment

R-Code

SAS-Code - Attachment Rochester_GEEZIP.sas
SAS-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_GEEZIP_Example code and data.pdf
SAS_Example_Output Rochester_GEEZIP_Example code and data.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 Rochester_ZIP_Check_Fit
Checklists

Stat Tools Disclaimer The development of this macro was supported in part by an NIH grant R21/R33 DA027521.
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 attachments
I Attachment Action Size Date Who Comment
elsesas Rochester_GEEZIP.sas manage 3.4 K 19 Jul 2011 - 14:22 RuiChen  
htmlhtm Rochester_GEEZIP_Example.htm manage 61.0 K 19 Jul 2011 - 15:27 RuiChen  
pdfpdf Rochester_GEEZIP_Example.pdf manage 408.5 K 19 Jul 2011 - 17:15 RuiChen  
elsesas Rochester_GEEZIP_Example.sas manage 9.6 K 19 Jul 2011 - 14:26 RuiChen  
Topic revision: r5 - 06 Apr 2012 - 16:17:56 - MaryBanach
 

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