The feasibility of omitting irradiation to the contralateral lower neck in stage N1 nasopharyngeal carcinoma patients

Table 3 Univariate analysis of prognostic factors

	3-y OS		3-y LFS		3-y NFS		3-y DFFS		3-y PFS
	%	P	%	P	%	P	%	P	%	P
Gender		0.777		0.379		0.584		0.814		0.908
M	92.1		92.2		97.2		94.5		91.8
F	92.3		100		100		93.3		93.3
Age		0.069		0.125		0.327		0.079		0.040
≧44	83.6		87.4		96.0		88.3		84.4
<44	100		100		100		100		100
T stage		0.037		0.078		0.268		0.429		0.199
T1-T2	100		100		100		96.6		96.6
T3-T4	80.8		85.0		95.5		91.1		86.7
Chemotherapy		0.471		0.531		0.709		0.497		0.428
Yes	90.8		93.1		97.7		93.2		91.0
No	100		100		100		100		100
Boost		0.711		0.366		0.079		0.330		0.969
Yes	83.3		83.3		91.7		100		91.7
No	94.6		97.5		100		92.3		92.5

ISSN: 1748-717X