Date: Thu, 17 Oct 1996 11:29:15 -0400 Reply-to: "Ioannis C. Dimakos" <idimakos@MAILBOX.SYR.EDU> From: "Ioannis C. Dimakos" <idimakos@MAILBOX.SYR.EDU> Subject: PROC LOGISTIC question To: Multiple recipients of list SAS-L <SAS-L@VM.MARIST.EDU>

Fellow SAS-Lers

A colleague is using PROC LOGISTIC with a model statement: model y=x1 x2 x3 x4, where y is group membership (0/1) and x1-x4 regular SES variables. The question to which we could not find an answer is: "Can SAS report not only on the effect of var. x2 on the outcome "y", but on the effect of various levels of x2 (1, 2, 3, 4) on y?"

X2 represents "college level" and takes one of 4 possible values: (1=freshman,...,4=senior).

Any ideas, suggestions would be appreciated.

Thanks.

John Dimakos

John:

First, you may consider using 3 dummy variables to represent 4 possible college levels. Second, if you treat X2 as an ordinal variable, you can use UNITS statement to calculate odds ratios corresponding to increase in different unit (1,2, or 3).

Good luck.

Chun Huang, Ph.D. Hawaii Osteoporosis Center 401 Kamakee St. Honolulu, HI 96814 USA Email: chuang@mana.medsurf.com Phone #: 808-592-2635