Problem Note 67634: The LT= option in the SEVERITY and HPSEVERITY procedures incorrectly includes some observations in the analysis
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The LT= option in the SEVERITY and HPSEVERITY procedures incorrectly includes observations in the analysis, where the LOSS variable is equal to the specified left-truncation threshold. Only observations that are greater than this threshold value should be considered “observed” and used in the analysis. In other words, PROC SEVERITY and PROC HPSEVERITY use the condition Y >= LT, rather than the documented condition, Y > LT, to determine the set of observed values to use in the analysis. None of the other truncation or censoring options are affected, such as the LC=, RT=, and RC= options.
This issue is fixed in SAS® 9.4M2 (TS1M2) (SAS/ETS® 13.2).
To circumvent the problem in releases prior to SAS 9.4M2, add a small number to your left-truncation threshold variable or value. For example, instead of specifying LT=100, specify LT=100.00001.
Operating System and Release Information
| Product Family | Product | System | Product Release | SAS Release | ||
| Reported | Fixed* | Reported | Fixed* | |||
| SAS System | SAS/ETS | z/OS | 12.1 | 13.2 | 9.3 TS1M2 | 9.4 TS1M2 |
| Microsoft® Windows® for x64 | 12.1 | 13.2 | 9.3 TS1M2 | 9.4 TS1M2 | ||
| Microsoft Windows 8 Enterprise 32-bit | 12.1 | 13.2 | 9.3 TS1M2 | 9.4 TS1M2 | ||
| Microsoft Windows 8 Enterprise x64 | 12.1 | 13.2 | 9.3 TS1M2 | 9.4 TS1M2 | ||
| Microsoft Windows 8 Pro 32-bit | 12.1 | 13.2 | 9.3 TS1M2 | 9.4 TS1M2 | ||
| Microsoft Windows 8 Pro x64 | 12.1 | 13.2 | 9.3 TS1M2 | 9.4 TS1M2 | ||
| Microsoft Windows 8.1 Enterprise 32-bit | 12.1 | 13.2 | 9.3 TS1M2 | 9.4 TS1M2 | ||
| Microsoft Windows 8.1 Enterprise x64 | 12.1 | 13.2 | 9.3 TS1M2 | 9.4 TS1M2 | ||
| Microsoft Windows 8.1 Pro 32-bit | 12.1 | 13.2 | 9.3 TS1M2 | 9.4 TS1M2 | ||
| Microsoft Windows 8.1 Pro x64 | 12.1 | 13.2 | 9.3 TS1M2 | 9.4 TS1M2 | ||
| Microsoft Windows Server 2003 Datacenter Edition | 12.1 | 9.3 TS1M2 | ||||
| Microsoft Windows Server 2003 Enterprise Edition | 12.1 | 9.3 TS1M2 | ||||
| Microsoft Windows Server 2003 Standard Edition | 12.1 | 9.3 TS1M2 | ||||
| Microsoft Windows Server 2003 for x64 | 12.1 | 9.3 TS1M2 | ||||
| Microsoft Windows Server 2008 | 12.1 | 13.2 | 9.3 TS1M2 | 9.4 TS1M2 | ||
| Microsoft Windows Server 2008 R2 | 12.1 | 13.2 | 9.3 TS1M2 | 9.4 TS1M2 | ||
| Microsoft Windows Server 2008 for x64 | 12.1 | 13.2 | 9.3 TS1M2 | 9.4 TS1M2 | ||
| Microsoft Windows Server 2012 Datacenter | 12.1 | 13.2 | 9.3 TS1M2 | 9.4 TS1M2 | ||
| Microsoft Windows Server 2012 R2 Datacenter | 12.1 | 13.2 | 9.3 TS1M2 | 9.4 TS1M2 | ||
| Microsoft Windows Server 2012 R2 Std | 12.1 | 13.2 | 9.3 TS1M2 | 9.4 TS1M2 | ||
| Microsoft Windows Server 2012 Std | 12.1 | 13.2 | 9.3 TS1M2 | 9.4 TS1M2 | ||
| Microsoft Windows XP Professional | 12.1 | 9.3 TS1M2 | ||||
| Windows 7 Enterprise 32 bit | 12.1 | 13.2 | 9.3 TS1M2 | 9.4 TS1M2 | ||
| Windows 7 Enterprise x64 | 12.1 | 13.2 | 9.3 TS1M2 | 9.4 TS1M2 | ||
| Windows 7 Home Premium 32 bit | 12.1 | 13.2 | 9.3 TS1M2 | 9.4 TS1M2 | ||
| Windows 7 Home Premium x64 | 12.1 | 13.2 | 9.3 TS1M2 | 9.4 TS1M2 | ||
| Windows 7 Professional 32 bit | 12.1 | 13.2 | 9.3 TS1M2 | 9.4 TS1M2 | ||
| Windows 7 Professional x64 | 12.1 | 13.2 | 9.3 TS1M2 | 9.4 TS1M2 | ||
| Windows 7 Ultimate 32 bit | 12.1 | 13.2 | 9.3 TS1M2 | 9.4 TS1M2 | ||
| Windows 7 Ultimate x64 | 12.1 | 13.2 | 9.3 TS1M2 | 9.4 TS1M2 | ||
| Windows Vista | 12.1 | 9.3 TS1M2 | ||||
| Windows Vista for x64 | 12.1 | 9.3 TS1M2 | ||||
| 64-bit Enabled AIX | 12.1 | 13.2 | 9.3 TS1M2 | 9.4 TS1M2 | ||
| 64-bit Enabled HP-UX | 12.1 | 13.2 | 9.3 TS1M2 | 9.4 TS1M2 | ||
| 64-bit Enabled Solaris | 12.1 | 13.2 | 9.3 TS1M2 | 9.4 TS1M2 | ||
| HP-UX IPF | 12.1 | 13.2 | 9.3 TS1M2 | 9.4 TS1M2 | ||
| Linux | 12.1 | 13.2 | 9.3 TS1M2 | 9.4 TS1M2 | ||
| Linux for x64 | 12.1 | 13.2 | 9.3 TS1M2 | 9.4 TS1M2 | ||
| Solaris for x64 | 12.1 | 13.2 | 9.3 TS1M2 | 9.4 TS1M2 | ||