Table 2.

AUC values from LOOCV in predicting grade 3 radiation dermatitis

Metric	Parameter	AUC	95% CI
Single parameter	(a) D10cm3	0.69	0.51	0.92
	(b) V52.5CGE	0.70	0.51	0.92
Two-parameter metric 1(c)	breast volume + D10cm3	0.72	0.52	0.93
Two-parameter metric 2 (d)	breast volume + V52.5CGE	0.73	0.51	0.94
Two-parameter metric 3 (e)	history of smoking+D10cm3	0.75	0.57	0.94
Two-parameter metric 4 (f)	history of smoking+V52.5CGE	0.83	0.63	0.96

The dose and volume parameters are related to skin5mm

Abbreviations: AUC area under the curve, CGE cobalt gray equivalent, CI confidence interval