Table 1.

Demographic and clinical features of LUAD patients and healthy subjects.

Variable	Training set		Validation set		Blinded study		Before/after surgery
	LUAD	Normal	LUAD	Normal	LUAD	Normal	LUAD
	(n = 45)	(n = 45)	(n = 389)	(n = 104)	(n = 39)	(n = 39)	(n = 23)
	No.	No.	No.	No.	No.	No.	No.
Average age (years)	64.6 ± 9.8	65.2 ± 10.0	65.5 ± 9.9	69.4 ± 8.3	61.8 ± 7.1	62.4 ± 8.5	64.3 ± 6.7
Sex
Female	21	25	205	59	21	20	13
Male	24	20	184	45	18	19	10
Stage
I	23		216		18		23
II	11		94		10
III	9		59		9
IV	2		20		2