Table 1.

Simple macro variables in the stratify macro i.e. options.

macro variable	default value	needed when	meaning
DATA	&syslast	mandatory	input data
OUT	&data	mandatory	output data
OUTCOMES		MODE = m	outcome events input data
EVENTDAT			outcome events output data
EVENTTIME	eventtime	mandatory	time of outcome event
SUBJECT		OUTCOMES or EXPDATS used	person ID for record linkage
TIME	time	zrtf-stmt	time of exposure events
EXPEVENT	expevent	zrtf-stmt	exposure event
VALUE	value	zrtf-stmt v = v	exposure event attribute, numeric
VALUEC	valuec	zrtf-stmt v = cv	exposure event attribute, character
BIRTHDATE	birthdate	zrtf-stmt v = a	birth date
SCALE	365.25	mandatory	scale relation between time units for time points and cut points/PYRS
GRANULARITY	1	MODE = s,c,m	follow-up ends at EVENTTIME + GRANULARITY
EVENTTYPE	eventtype	MODE = c,i,m	type of outcome
NOEVENTVALUE		MODE = c,i,m	value of eventtype for person-time
MODE	s(ing(le))	mandatory other values = c(omp(eting)) i(ntens(ity)) m(ult(iple))	when and how follow-up ends
METHOD	fst	mandatory other values = arr sum chunk noagg	method of aggregation or no aggregation (noagg)
CHUNKSIZE	5000	METHOD = chunk	see [8]