Prognostic value of MRI-derived masticator space involvement in IMRT-treated nasopharyngeal carcinoma patients

Radiation Oncology

Table 2 Comparison of survival outcomes between different degrees of masticatory space involvement and T-categories

Log rank (Mantel-Cox)	P-value	OS	LRFS	RRFS	DMFS
MPM only vs.	T1	0.010	0.114	0.417	0.008
	T2	0.056	0.976	0.333	0.250
	T3	0.434	0.814	0.612	0.742
	T4	0.097	0.008	0.147	0.184
	LPM	0.098	0.027	0.459	0.273
	ITF	0.151	0.057	0.077	0.058
LPM vs.	T1	<0.001	<0.001	0.041	<0.001
	T2	<0.001	0.005	0.779	0.007
	T3	<0.001	0.001	0.714	0.057
	T4	0.910	0.482	0.404	0.861
	MPM only	0.098	0.027	0.459	0.273
	ITF	0.560	0.553	0.161	0.135
ITF vs.	T1	<0.001	<0.001	0.005	<0.001
	T2	0.004	0.033	0.257	0.004
	T3	0.037	0.034	0.124	0.020
	T4	0.572	0.886	0.412	0.210
	MPM only	0.151	0.057	0.077	0.058
	LPM	0.560	0.553	0.161	0.135

MPM medial pterygoid muscle, LPM lateral pterygoid muscle, ITF infra temporal fossa, OS overall survival, LRFS local relapse-free survival, RRFS regional relapse-free survival, DMFS Distant metastasis-free survival

ISSN: 1748-717X