Table 4.

Correlation coefficients of studies using histopathological criteria to determine response to neoadjuvant therapy

Study	Classification	DWI timing	Correlation coefficient
Cuneo KC, et al [23]	Evans*	Pre	0.94* (p = 0.001)
Dalah E, et al [24]	College of American Pathologists	Post	− 0.52 (p < 0.05)
Okada KI, et al (2017) [26]	Evans*	Pre	0.63 (p = 0.001)
		Post	0.41 (p = 0.144)
Okada KI, et al (2020) [13]	Evans*	Pre	0.63 (p < 0.001)
		Post	0.71 (p < 0.001)
		Pre/Post Difference	0.29 (p = 0.138)

^*Modified version of the Evans classification [20]. Pre, pre-neoadjuvant therapy; Post, post-neoadjuvant therapy