TITLE '2X2 Contingency Table';
OPTIONS LS = 72 PS=56;

DATA HEART;
	INPUT TREATMNT $ ATTACK $ COUNT;
DATALINES;
PLACEBO FATAL 18
PLACEBO NONFATAL 171
ASPIRIN FATAL 5
ASPIRIN NONFATAL 99
;

PROC FREQ ORDER = DATA;
	WEIGHT COUNT;
	TABLES TREATMNT*ATTACK/ CHISQ EXPECTED deviation MEASURES relrisk;
RUN;