Create a variable with 3 categories

[Moshe Marko]

Hi,,
I have a variable with three categories:

score of 0-4 category "0", 5-12 category "1', and > 12 = category "2"

I would like to use a logistic regression between category 1 and 2. How do
I eliminate category "0" from the analysis?

Thanks

Moshe

Moshe Marko, PT, DPT, MHS, OCS, CSCS
Assistant Professor
Department of Physical Therapy Education
College of Health Professions
SUNY Upstate Medical University
Room 2232  Silverman Hall
750 Adams Street
Syracuse, NY 13210-1834
315 464 6577
FAX [phone]
[hidden email]

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[Maguin, Eugene]

Moshe,

If X is the variable, why not do this?

Missing values X(0).
Logistic ....

Gene Maguin

-----Original Message-----
From: SPSSX(r) Discussion [mailto:[hidden email]] On Behalf Of
Moshe Marko
Sent: Monday, October 04, 2010 2:28 PM
To: [hidden email]
Subject: Create a variable with 3 categories

Hi,,
I have a variable with three categories:

score of 0-4 category "0", 5-12 category "1', and > 12 = category "2"

I would like to use a logistic regression between category 1 and 2. How do
I eliminate category "0" from the analysis?

Thanks

Moshe

Moshe Marko, PT, DPT, MHS, OCS, CSCS
Assistant Professor
Department of Physical Therapy Education
College of Health Professions
SUNY Upstate Medical University
Room 2232  Silverman Hall
750 Adams Street
Syracuse, NY 13210-1834
315 464 6577
FAX [phone]
[hidden email]

=====================
To manage your subscription to SPSSX-L, send a message to
[hidden email] (not to SPSSX-L), with no body text except the
command. To leave the list, send the command
SIGNOFF SPSSX-L
For a list of commands to manage subscriptions, send the command
INFO REFCARD

=====================
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command. To leave the list, send the command
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For a list of commands to manage subscriptions, send the command
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[Bruce Weaver]

Moshe Marko wrote

Hi,,
I have a variable with three categories:

score of 0-4 category "0", 5-12 category "1', and > 12 = category "2"

I would like to use a logistic regression between category 1 and 2. How do
I eliminate category "0" from the analysis?

Thanks

Moshe

Gene has given one way to do what you've asked.  But I'm wondering why you want to do that.  Are you really uninterested in the 0-4 category?  I ask, because another option would be keep all 3 outcome categories, and use multinomial or ordinal logistic regression (via the NOMREG and PLUM procedures respectively).