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SWOG 0023
Overall Survival From Randomization
The P-value for testing the alternative hypothesis of a 33% improvement with
gefitinib was
p= 0.0015
0%
20%
40%
60%
80%
100%
0
12
24
36
Months After Randomization
Gefitinib
Placebo
N
124
131
Events
43
32
Median
in Months
19
29
P=0.09
2-sided stratified
Log-rank