Table II.

Correlation of the response rate (RECIST) by Pearson’s correlation test.

	r	p-value
ADC (0)	−0.272	0.20
%ADC	+0.597	0.016
ϕ (MRI-0)	+0.222	0.301
%ϕ (US-1)	+0.362	0.083

RECIST, Response Evaluation Criteria In Solid Tumors; r, coefficient of correlation; ADC, apparent diffusion coefficient; ADC (0), ADC value before neoadjuvant chemotherapy (NACT); %ADC, change in ADC value between before and after first-time NACT administration; ϕ (MRI-0), maximum tumor diameter measured on MRI before NACT; %ϕ (US-1), response rate measured on gray-scale ultrasound image between before and after first-time NACT administration.