Replanning Criteria and Timing Definition for Parotid Protection-Based Adaptive Radiation Therapy in Nasopharyngeal Carcinoma

Table 3

AUC and cut-off values in ROC analysis.

Parameter	AUC value	Cut-off value
Initial parotid volume	0.570	52.80 cm^3
Initial parotid	0.566	32.04 Gy
Weight loss rate	0.568	12.24%
Weight loss rate at 11th fraction	0.662	2.30%
Weight loss rate at 16th fraction	0.597	3.60%
Weight loss rate at 21st fraction	0.575	4.40%