Table 1.

Basic patient demographics

	Discovery stage		Validation stage
	NPC	Control	NPC	Control
Number	7	7	129	100
Gender
Male	5	5	100	41
Female	2	2	29	59
Mean age ± SD (years)	59 ± 12	59 ± 10	51 ± 12	51 ± 10
Age range (years)	38–76	40–74	19–76	24–79
T stage
T1	0		19
T2	2		46
T3	3		39
T4	2		25
N stage
N0	1		17
N1	1		50
N2	5		55
N3	0		7
M stage
M0	6		122
M1	1		7
Overall stage
I	0		4
II	0		36
III	4		55
IV	3		34