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When using PROC REPORT to summarize clinical trials data, you want to add a summary row at the end of each BY group as well as a grand total at the end of the report. Which combination of BREAK and RBREAK statements would correctly achieve this?

You have two SAS datasets, 'baseline' and 'followup', that are supposed to have the same structure and variable attributes. However, discrepancies are suspected. You need to compare the datasets to see if there are any differences in the attributes of the variables. Which PROC COMPARE option would you use to display only those variables that differ, without listing those that match?

In a clinical study comparing the time to event (such as time to relapse) between two different treatments, what SAS procedure would you use to estimate the survival function and compare the survival times between the two groups?

In a clinical study report using SAS, you need to capture attributes such as style elements associated with a Kaplan-Meier survival plot generated by PROC LIFETEST. You've enabled ODS TRACE. After running the procedure, which output object listed in the ODS trace output would you look into for the survival plot details?

You are working on a clinical trial data set in SAS, and you need to create a new variable that captures the number of days since the start of the study. The study start date is available as an automatic variable called `Study_Start_Date`, and each patient's visit date is recorded in a variable called `Visit_Date`. Which of the following code snippets correctly calculates the new variable `Days_Since_Start`?