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SASuserlot
Barite | Level 11

What procedure need to use to get unadjusted P values.i tried multi test but  not sure  how to get unadjusted. Any suggestions please .

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Accepted Solutions
PaigeMiller
Diamond | Level 26

@SASuserlot wrote:
I am running proc mixed procedure and multitest procedure. I am getting the p-values, So I am curious what is the difference between these p values and unadjusted p values. is there a difference?

Adjusted p-values usually are adjusted because you are performing multiple tests at once, and so the p-values are adjusted to yield an overall type-I error rate that is desired (say 0.05 across all tests) rather than the type one error rate desired (0.05) for a single (not multiple) test.

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Paige Miller

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5 REPLIES 5
ballardw
Super User

Unadjuste p-value for what?

 

Some procedures, like Multtest, are specifically designed to make appropriate adjustments. So you really need to describe what you are testing.

PaigeMiller
Diamond | Level 26

Almost all procedures will give un-adjusted p values. Please explain your problem in more detail so we can know what you are talking about.

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Paige Miller
SASuserlot
Barite | Level 11
I am running proc mixed procedure and multitest procedure. I am getting the p-values, So I am curious what is the difference between these p values and unadjusted p values. is there a difference?
PaigeMiller
Diamond | Level 26

@SASuserlot wrote:
I am running proc mixed procedure and multitest procedure. I am getting the p-values, So I am curious what is the difference between these p values and unadjusted p values. is there a difference?

Adjusted p-values usually are adjusted because you are performing multiple tests at once, and so the p-values are adjusted to yield an overall type-I error rate that is desired (say 0.05 across all tests) rather than the type one error rate desired (0.05) for a single (not multiple) test.

--
Paige Miller
Reeza
Super User

Unadjusted typically means it includes only the variable/treatment and the outcome. You 'adjust' for other variables by then including them in the model, so adding 'age' variable adjusts for the age factor.

 

EDIT: Given the recent update from the OP, this answer is not correct or relevant.

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