Role of primary tumor volume and metastatic lymph node volume in response to curative effect of definitive radiotherapy for locally advanced head and neck cancer

Table 3 Volume retraction rate, ORR, and LCR in the metastatic lymph node volume group

Item	Volume shrinkage rate (%)	P	ORR	P	LCR	P
N-group	T-test	0.001*	Chi-square test	0.002*	Chi-square test	0.037*
Small-N	88.81		90.6% (29/32)		90.6% (29/32)
Large-N	68.71		58.5% (24/41)		70.7% (29/41)
CCRT or not	T-test	0.47*	Chi-square test	0.030*	Chi-square test	0.037*
N-CCRT	84.10% ± s3.11%		83.8% (31/37)		89.2% (33/37)
N-RT	70.76% ± s5.77%		61.1% (22/36)		69.4% (25/36)

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