SUPPORT / SAMPLES & SAS NOTES
Problem Note 43169: Max-rescaled R-square does not include the binomial constant with events/trials data
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When events/trials data are modeled in PROC LOGISTIC, the Max-rescaled R-square value produced by the RSQUARE option does not include the binomial constant, (nr ), in the intercept-only likelihood L(0), where n is the number of trials, and r is the number of events. That is, it is computed as though the data were not events/trials data. With the constant included, the Max-rescaled R-square is larger. Note that the omission of the constant does not affect the computation of R-square. When events/trials syntax is not used, the omission of the constant also does not affect the computation of the Max-rescaled R-square.
Currently, there is no circumvention for this problem.
Operating System and Release Information
| Product Family | Product | System | SAS Release | |
| Reported | Fixed* | |||
| SAS System | SAS/STAT | Tru64 UNIX | 8.1 TS1M0 | 9.3 TS1M0 |
| Solaris | 8.1 TS1M0 | 9.3 TS1M0 | ||
| OpenVMS Alpha | 8.1 TS1M0 | 9.3 TS1M0 | ||
| IRIX | 8.1 TS1M0 | 9.3 TS1M0 | ||
| HP-UX | 8.1 TS1M0 | 9.3 TS1M0 | ||
| AIX | 8.1 TS1M0 | 9.3 TS1M0 | ||
| ABI+ for Intel Architecture | 8.1 TS1M0 | 9.3 TS1M0 | ||
| Windows Millennium Edition (Me) | 8.1 TS1M0 | |||
| Microsoft Windows XP Professional | 8.1 TS1M0 | 9.3 TS1M0 | ||
| Microsoft Windows NT Workstation | 8.1 TS1M0 | |||
| Microsoft Windows 2000 Professional | 8.1 TS1M0 | |||
| Microsoft Windows 2000 Server | 8.1 TS1M0 | |||
| Microsoft Windows 2000 Datacenter Server | 8.1 TS1M0 | |||
| Microsoft Windows 2000 Advanced Server | 8.1 TS1M0 | |||
| Microsoft Windows 95/98 | 8.1 TS1M0 | |||
| OS/2 | 8.1 TS1M0 | |||
| OpenVMS VAX | 8.1 TS1M0 | 9.3 TS1M0 | ||
| z/OS | 8.1 TS1M0 | 9.3 TS1M0 | ||