variable		RFS		DFS		OS
T stage	T1	90%	0.437	84%	0.756	80%	0.437
	T2	88%		67%		70%
	T3	82%		61%		66%
	T4a	71%		58%		50%
Nodal status	Positive	85%	0.536	50%	0.006	60%	0.055
Nodal status	negative	78.5	0.536	76%	0.006	70%	0.055
Stage	Stage II	77%	0.734	75%	0.45	79%	0.136
	Stage III	71%		71%		72%
	Stage IVa	66%		66%		59%
Safety margins	positive	72%	0.828	51%	0.335	54%	0.521
	Close	79%		57%		66%
	negative	81%		60%		69%
Perineural invasion	Positive	55%	0.011	56%	0.007	61%	0.036
Perineural invasion	negative	71%	0.011	69%	0.007	82%	0.036
Treatment modality	RTH	43.6%	0.007	62.5%	0.003	48%	0.009
Treatment modality	CCRTH	73%	0.007	83%	0.003	78%	0.009