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. It\x92s 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

Attachments 4

Topic attachments
I	Attachment	Action	Size	Date	Who
sas	Rochester_GEEZIP.sas	manage	3 K	19 Jul 2011 - 19:22	UnknownUser
htm	Rochester_GEEZIP_Example.htm	manage	61 K	19 Jul 2011 - 20:27	UnknownUser
pdf	Rochester_GEEZIP_Example.pdf	manage	408 K	19 Jul 2011 - 22:15	UnknownUser
sas	Rochester_GEEZIP_Example.sas	manage	9 K	19 Jul 2011 - 19:26	UnknownUser

This topic: CTSpedia > WebHome > StatToolsHome > ContributeStatTools > StatToolsTopic051
Topic revision: 06 Apr 2012, MaryBanach

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