Proc Freq Fisher exact

SASuserlot — Thu, 04 Mar 2021 14:57:14 GMT

I am running a prof freq for fisher exact p values, I am not able to generate the p value log showing the note. can anybody say what problem I am having. Thanks


381 data fish;
382 merge adsl(in=a where=(SAFE='Y' and trtan ne 2)) ae(in=b);
383 by subjid;
384 if a;
385 if b=1 then response='Y';
386 else response='N';
387 run;

NOTE: There were 365 observations read from the data set WORK. ADSL.
WHERE (SAFE='Y') and (trtan not = 2);
NOTE: There were 1440 observations read from the data set WORK.AE.
NOTE: The data set WORK.FISH has 1078 observations and 132 variables.
NOTE: DATA statement used (Total process time):
real time 0.09 seconds
cpu time 0.03 seconds


388 ods listing;
389 title 'p-value: Meformin vs. Placebo';
390 ods output FishersExact=pvalue11;
391 proc freq data=FISH (where=(trta in ('Meformin', 'Placebo')));
392 table trta*response / fisher;
393 run;

NOTE: No statistics are computed for TRTA * response because response has fewer than 2 nonmissing
levels.
WARNING: Output 'FishersExact' was not created. Make sure that the output object name, label, or
path is spelled correctly. Also, verify that the appropriate procedure options are used to
produce the requested output object. For example, verify that the NOPRINT option is not
used.
NOTE: There were 726 observations read from the data set WORK.FISH.
WHERE trta in ('Metformin', 'Placebo');
NOTE: PROCEDURE FREQ used (Total process time):
real time 0.14 seconds
cpu time 0.12 seconds

Re: Proc Freq Fisher exact

ballardw — Thu, 04 Mar 2021 15:10:38 GMT

This note is pretty clear:

NOTE: No statistics are computed for TRTA * response because response has fewer than 2 nonmissing
levels.

You have a variable that only has one value so cannot make any 2x2 (or greater) table at all.

Probably due to misspelling I would guess "Metformin" as "Meformin"

Re: Proc Freq Fisher exact

SASuserlot — Thu, 04 Mar 2021 15:33:31 GMT

Thanks. you are right. I spelled it wrong twice before on this dataset, that's why i did not got any warning or error. I got it now. Thanks again.

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Proc Freq Fisher exact

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Re: Proc Freq Fisher exact