Table 2.

The correlation between the %DE and the μGI in different regions for NPC patients.

		PTV			GTV			Parotid L	Parotid R	Brainstem	Spinalcord
		D95	Dmean	D5	D98	Dmean	D2	Dmean	Dmean	D1	D1
μGIwhole	r	0.187	0.303	0.2	0.063	0.44	0.551	0.39	0.493	-0.149	-0.066
	p	0.149	0.018*	0.122	0.628	<0.001*	<0.001*	0.002*	<0.001*	0.253	0.613
μGI10%	r	0.136	-0.085	-0.068	-0.008	-0.299	-0.351	0.054	-0.151	0.524	0.063
	p	0.296	0.513	0.6	0.952	0.019*	0.005*	0.679	0.246	<0.001*	0.628
μGI20%	r	0.101	-0.005	0.028	0.189	-0.151	-0.176	0.051	0.052	0.247	0.01
	p	0.439	0.967	0.833	0.145	0.246	0.174	0.697	0.693	0.055	0.94
μGI30%	r	0.225	-0.053	-0.02	0.127	-0.218	-0.157	0.18	0.051	0.472	0.061
	p	0.082	0.685	0.88	0.33	0.092	0.226	0.164	0.699	<0.001*	0.641
μGI40%	r	0.245	0.019	0.002	0.149	-0.101	-0.012	0.248	0.169	0.343	0.076
	p	0.057	0.882	0.985	0.252	0.441	0.928	0.054	0.192	0.007*	0.561
μGI50%	r	0.256	0.078	0.042	0.114	-0.049	0.039	0.259	0.23	0.272	0.038
	p	0.046*	0.552	0.749	0.381	0.708	0.768	0.044*	0.075*	0.034*	0.77
μGI60%	r	0.276	0.134	0.103	0.076	0.066	0.124	0.257	0.247	0.232	-0.058
	p	0.031*	0.304	0.431	0.558	0.614	0.34	0.046*	0.055	0.072	0.658

“*” means a significant difference, p < 0.05. D98, D95, D5, and D1 refers to the dose received by 98%, 95%, 5% and 1% volume of the structures including PTV, GTV, Parotid gland, Brainstem, Spinalcord, respectively. Dmean refers to the mean dose of the structures.