Problem Note 56198: Incorrect p-values produced by the ORPVALUE and CLODDS= options with effects parameterization in PROC LOGISTIC
When effects parameterization is used in PROC LOGISTIC, the p-values in the Odds Ratio Estimates table produced by the ORPVALUE and CLODDS= options in the MODEL statement are incorrect. The displayed point estimates and confidence limits are correct. Effects parameterization is the default parameterization method for CLASS variables and is used if the PARAM= option is not specified, or when PARAM=EFFECT is specified in the CLASS statement.
To avoid the problem, use a different parameterization such as PARAM=REF or PARAM=GLM. Alternatively, use the method described and illustrated in SAS Note 53376: "Computing p-values for odds ratios."
Operating System and Release Information
| SAS System | SAS/STAT | z/OS | 14.1 | 14.2 | 9.4 TS1M3 | 9.4 TS1M4 |
| Z64 | 14.1 | 14.2 | 9.4 TS1M3 | 9.4 TS1M4 |
| Microsoft® Windows® for x64 | 14.1 | 14.2 | 9.4 TS1M3 | 9.4 TS1M4 |
| Microsoft Windows 8 Enterprise 32-bit | 14.1 | 14.2 | 9.4 TS1M3 | 9.4 TS1M4 |
| Microsoft Windows 8 Enterprise x64 | 14.1 | 14.2 | 9.4 TS1M3 | 9.4 TS1M4 |
| Microsoft Windows 8 Pro 32-bit | 14.1 | 14.2 | 9.4 TS1M3 | 9.4 TS1M4 |
| Microsoft Windows 8 Pro x64 | 14.1 | 14.2 | 9.4 TS1M3 | 9.4 TS1M4 |
| Microsoft Windows 8.1 Enterprise 32-bit | 14.1 | 14.2 | 9.4 TS1M3 | 9.4 TS1M4 |
| Microsoft Windows 8.1 Enterprise x64 | 14.1 | 14.2 | 9.4 TS1M3 | 9.4 TS1M4 |
| Microsoft Windows 8.1 Pro | 14.1 | 14.2 | 9.4 TS1M3 | 9.4 TS1M4 |
| Microsoft Windows 8.1 Pro 32-bit | 14.1 | 14.2 | 9.4 TS1M3 | 9.4 TS1M4 |
| Microsoft Windows Server 2008 | 14.1 | 14.2 | 9.4 TS1M3 | 9.4 TS1M4 |
| Microsoft Windows Server 2008 R2 | 14.1 | 14.2 | 9.4 TS1M3 | 9.4 TS1M4 |
| Microsoft Windows Server 2008 for x64 | 14.1 | 14.2 | 9.4 TS1M3 | 9.4 TS1M4 |
| Microsoft Windows Server 2012 Datacenter | 14.1 | 14.2 | 9.4 TS1M3 | 9.4 TS1M4 |
| Microsoft Windows Server 2012 R2 Datacenter | 14.1 | 14.2 | 9.4 TS1M3 | 9.4 TS1M4 |
| Microsoft Windows Server 2012 R2 Std | 14.1 | 14.2 | 9.4 TS1M3 | 9.4 TS1M4 |
| Microsoft Windows Server 2012 Std | 14.1 | 14.2 | 9.4 TS1M3 | 9.4 TS1M4 |
| Windows 7 Enterprise 32 bit | 14.1 | 14.2 | 9.4 TS1M3 | 9.4 TS1M4 |
| Windows 7 Enterprise x64 | 14.1 | 14.2 | 9.4 TS1M3 | 9.4 TS1M4 |
| Windows 7 Home Premium 32 bit | 14.1 | 14.2 | 9.4 TS1M3 | 9.4 TS1M4 |
| Windows 7 Home Premium x64 | 14.1 | 14.2 | 9.4 TS1M3 | 9.4 TS1M4 |
| Windows 7 Professional 32 bit | 14.1 | 14.2 | 9.4 TS1M3 | 9.4 TS1M4 |
| Windows 7 Professional x64 | 14.1 | 14.2 | 9.4 TS1M3 | 9.4 TS1M4 |
| Windows 7 Ultimate 32 bit | 14.1 | 14.2 | 9.4 TS1M3 | 9.4 TS1M4 |
| Windows 7 Ultimate x64 | 14.1 | 14.2 | 9.4 TS1M3 | 9.4 TS1M4 |
| 64-bit Enabled AIX | 14.1 | 14.2 | 9.4 TS1M3 | 9.4 TS1M4 |
| 64-bit Enabled Solaris | 14.1 | 14.2 | 9.4 TS1M3 | 9.4 TS1M4 |
| HP-UX IPF | 14.1 | 14.2 | 9.4 TS1M3 | 9.4 TS1M4 |
| Linux for x64 | 14.1 | 14.2 | 9.4 TS1M3 | 9.4 TS1M4 |
| Solaris for x64 | 14.1 | 14.2 | 9.4 TS1M3 | 9.4 TS1M4 |
*
For software releases that are not yet generally available, the Fixed
Release is the software release in which the problem is planned to be
fixed.
PROC LOGISTIC reports incorrect p-values in the Odds Ratio Estimates table produced by the ORPVALUE and CLODDS= options in a model using the default parameterization.
| Type: | Problem Note |
| Priority: | high |
| Topic: | Analytics ==> Categorical Data Analysis
Analytics ==> Regression
SAS Reference ==> Procedures ==> LOGISTIC
|
| Date Modified: | 2016-09-28 09:47:38 |
| Date Created: | 2015-07-16 12:16:47 |
