The SURVEYREG Procedure

Adjusted R-Square

If you specify the ADJRSQ option in the MODEL statement, PROC SURVEYREG computes an multiple R-square adjusted as the weighted regression as

\[  \mbox{ADJRSQ} = \left\{  {\begin{array}{ll} 1 - \displaystyle \frac{n(1 - R^2)}{n - p} &  \mbox{if no intercept}\\ 1 - \displaystyle \frac{(n - 1)(1 - R^2)}{n - p} &  \mbox{otherwise} \end{array}} \right.  \]

where $R^2$ is the multiple R-square.