Table 1.

Patient Characteristics

Variable		N	(%)
Age (mean = 62; range=26-84)	<=50	41	(16%)
	51~60	73	(29%)
	61~70	86	(34%)
	>70	55	(22%)
Gender	Female	118	(46%)
	Male	137	(54%)
Ethnicity	Caucasian	209	(82%)
	Hispanic	16	(6%)
	African American	16	(6%)
	Asian	14	(5%)
Smoker	Current	23	(9%)
	Former	177	(69%)
	Never	55	(22%)
Histology	Adenocacinoma	160	(63%)
	Squamous	46	(18%)
	Others	49	(19%)
Prior erlotinib therapy	No	139	(55%)
	Yes	116	(46%)
ECOG performance status	0	22	(9%)
	1	197	(77%)
	2	36	(14%)
Prior cytotoxic chemo therapy (median = 2; range=1-6)	1	95	(37%)
	2	84	(33%)
	3	40	(16%)
	4	24	(9%)
	5	9	(4%)
	6	3	(1%)