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From: Audrey M. on 22 Feb 2010 07:28
I need to perform a non-decreasing trend test using Jonckheere
statistics. I know that I need to use PROC FREQ but my problem is for
coding of my variable.
My variable of response is Y.
My other variable is the treatment group and I have 4 treatments:
- Placebo
- Study drug dose 100
- Study drug dose 200
- Study drug dose 300
According to my understanding of "non-decreasing" I will code the
treatment in:
X = "1" if Placebo
X = "2" if Study drug dose 100
X = "3" if Study drug dose 200
X = "4" if Study drug dose 300

Do you agree with my classification of X or not ?
Thanks.
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