Programming the statistical procedures from SAS

How to find outliers in proc logistic?

Accepted Solution Solved
Reply
Contributor
Posts: 49
Accepted Solution

How to find outliers in proc logistic?

In ordinary regressions, we can use 2*sd or students' residual to detect and remove outliers, but in logistic regression, how to find outliers?

thanks


Accepted Solutions
Solution
2 weeks ago
SAS Employee
Posts: 308

How to find outliers in proc logistic?

Posted in reply to MikeTurner

The standardized deviance residuals and the likelihood residuals (available in PROC LOGISTIC in SAS 9.3, or in PROC GENMOD in earlier releases) have distributions reasonably close to standard normal.  So, values greater than 2 or less than -2 might be considered suspect. 

View solution in original post


All Replies
Respected Advisor
Posts: 2,655

How to find outliers in proc logistic?

Posted in reply to MikeTurner

If you are using PROC LOGISTIC, check out the syntax for the OUTPUT statement.  It will give you many of the parameters you are looking for--studentized residuals, leverage, dfbetas, etc.

Steve Denham

Solution
2 weeks ago
SAS Employee
Posts: 308

How to find outliers in proc logistic?

Posted in reply to MikeTurner

The standardized deviance residuals and the likelihood residuals (available in PROC LOGISTIC in SAS 9.3, or in PROC GENMOD in earlier releases) have distributions reasonably close to standard normal.  So, values greater than 2 or less than -2 might be considered suspect. 

☑ This topic is solved.

Need further help from the community? Please ask a new question.

Discussion stats
  • 2 replies
  • 2586 views
  • 0 likes
  • 3 in conversation