Table 1.

 Clinicopathologic characteristics of lung adenocarcinomas

	PCR	Primary tumor		Brain metastasis
		Multiplex (%)	Nested (%)	Both (%)
No. of cases	–	275	138	22
Gender	Male	161 (59)	81 (59)	15 (68)
	Female	114 (41)	57 (41)	7 (32)
Age (years)	Mean	60.7	62.0	57.3
	Range	30–84	30–84	48–74
Pathological stage	I	201 (73)	124 (90)	–
	II	27 (10)	6 (4)	–
	III	45 (16)	8 (6)	–
	IV	2 (1)	0 (0)	–
Smoking history	Smoker	71 (55)	69 (58)	15 (68)
	Nonsmoker	57 (45)	51 (43)	7 (32)
	Unknown	147	18	0
p53 mutation	+	34 (32)	34 (33)	16 (73)
	–	72 (68)	70 (67)	6 (27)
	ND	169	34	0

ND, not determined.