During the execution of a SAS program, the programmer wants not only to display each step generated by macro execution but also to show the values of macro variables at execution time. Which combination of system options should the programmer use?

During a clinical trial, data were collected on a nominal categorical variable indicating patients' blood type (Type A, Type B, Type AB, Type O). The goal is to analyze the distribution of blood types among patients who experienced an adverse event versus those who did not. Which of the following statistical methods BEST suits the objective of comparing the distribution of a nominal categorical variable across two independent groups?

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?

A clinical trials programmer is tasked with creating a Kaplan-Meier survival plot with a log-rank test for comparing survival curves between two treatment groups. The dataset includes patient ID, treatment group, time to event or censor, and the event indicator. Which PROC step will they likely use to produce the required output?

You are tasked with producing a series of Forest plots to graphically display the results of a subgroup analysis in a clinical study using PROC SGPLOT. You must alter the marker attributes for each subgroup to enhance the clarity of the plot. Which combination of statements and options should you use to modify the marker color, size, and style for each subgroup's reference line, within the context of PROC SGPLOT?