Table 5.

Survival by RPA class

RPA class	EGFR mutation negative		EGFR mutation positive
	Survival (mos)	95% CI	Survival (mos)	95% CI
1	Not yet reached	9.0–.	Not yet reached	.–.
2	7.4	5.7–11.7	17.9	12.0–27.6
3	3.7	1.5–19.9	5.9	3.9–10.5