Table 6.

Multivariate analysis

Factor	B	S.E.	Wals	Sig.	Exp (B)	95% C.I. of the EXP (B)
						Lower limit	Upper limit
Age	37.029	7965.487	0	0.996	1.2069E+16	0	.
TNM stage	-16.893	5706.15	0	0.998	0	0	.
Smoking history	3.497	0.995	12.35	0	33	4.695	231.956
Maximum tumor diameter	18.345	5557.776	0	0.997	92666639.6	0	.