Hi all, I need to add the calculated Risk Difference to listings of preferred terms for a trial. There are 2 arms: dose and placebo.
Per FDA standards, I would like to add risk difference with 95% confidence intervals. This can be added to either the AE data set, or to the proc report.
prefterm dose placebo riskdifference
Cold 3 2
Flu 2 1
Headache 1 3
You need to specify the RISKDIFF option in PROC FREQ.
Ciao, Koen
Thanks for your reply. Do you know how data should be structured before using proc freq?
See documentation :
SAS Help Center: Inputting Frequency Counts
PROC FREQ can use either raw data or cell count data to produce frequency and crosstabulation tables. Raw data, also known as case-record data, report the data as one record for each subject or sample member. Cell count data report the data as a table, listing all possible combinations of data values along with the frequency counts.
The statistics for contingency tables include the following:
chi-square tests and measures
measures of association
risks (binomial proportions) and risk differences for 2 x 2 - tables
odds ratios and relative risks for 2 x 2 - tables
tests for trend
tests and measures of agreement
Cochran-Mantel-Haenszel statistics
Ciao, Koen
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