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 2 Volume retraction rates, ORR, and LCR in the primary tumor volume group

Item	Volume shrinkage rate (%)	P	ORR	P	LCR	P
T-group	T-test	0.801	Chi-square test	0.118	Chi-square test	0.315
Small-T	51.66		82.4% (56/68)		72.8% (59/68)
Large-T	49.44		67.9% (19/28)		78.6% (22/28)
CCRT or not	T-test	0.133	Chi-square test	0.057	Chi-square test	0.088
CCRT	57.38		86.7% (39/45)		91.1% (41/45)
RT	45.40		70.6% (36/51)		78.4% (40/51)

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