Table 2.

Univariate analyses: prognostic factors for 5 year overall survival, disease-free survival, disease-specific survival, and local control.

Prognostic factor	Overall survival		Disease-free survival		Disease-specific survival		Local control
	5 year (%)	p	5 year (%)	p	5 year (%)	p	5 year (%)	p
Stage		0.001		0.003		0.033		0.001
Stage 0	86		72.1		95.8		79.2
Stage 1	84		74.9		95.5		93.1
Stage 2	67.6		62.4		88.6		78.7
Anterior commissure infiltration		<0.001		<0.001		<0.001		<0.001
No	87.3		79.3		96.7		92.7
Yes	79		66.6		93.6		85.6
Radiotherapy techniques		0.61		0.51		0.231		0.769
Conventional	81		73.1		95.6		86.5
3DCRT	83		71.8		92.2		90.9
VMAT	87.2		76.7		100		94.7
Beam energy		0.52		0.55		0.028		0.266
Cobalt-60	79.2		72.2		91.2		86.6
6 MV X-rays	85.4		72.5		98.4		91.4
Log-rank test (95% CI)