Documentation Example 14 for PROC SEQDESIGN
/****************************************************************/
/* S A S S A M P L E L I B R A R Y */
/* */
/* NAME: SEQDX14 */
/* TITLE: Documentation Example 14 for PROC SEQDESIGN */
/* PRODUCT: STAT */
/* SYSTEM: ALL */
/* KEYS: group sequential design */
/* PROCS: SEQDESIGN */
/* DATA: */
/* */
/* SUPPORT: Yang Yuan UPDATE: Aug 21, 2007 */
/* REF: PROC SEQDESIGN, EXAMPLE 14 */
/* MISC: */
/****************************************************************/
proc seqdesign altref=0.693147
;
OBrienFleming: design nstages=4
method=obf
;
samplesize model=twosamplesurvival
( nullhazard=0.03466
accrual=exp(parm=-0.1)
loss=exp(hazard=0.05)
acctime=20);
run;
proc seqdesign altref=0.693147
;
OBrienFleming: design nstages=4
method=obf
;
samplesize model=twosamplesurvival
( nullhazard=0.03466
accrual=exp(parm=-0.1)
loss=exp(hazard=0.05)
accnobs=360 acctime=20);
run;