Table 6.

Pairwise comparison of ROC curves for multimodal ultrasound, combined tumor markers and their combination^a

	Difference between areas	95% Confidence Interval	Significance level
Joint/multimodal ultrasound	0.125	0.078 to 0.172	P<0.001
Joint/tumor markers	0.043	0.016 to 0.070	P=0.002
Multimodal ultrasound/tumor markers	0.082	0.019 to 0.146	P=0.011

^aDeLong et al. [19], 1988.