. Author manuscript; available in PMC: 2019 Jun 1.

Published in final edited form as: Eur Radiol. 2018 Jan 12;28(6):2516–2524. doi: 10.1007/s00330-017-5202-4

Table 4.

Comparison of ADC values between benign and malignant lesions stratified by background parenchymal enhancement (BPE), amount of fibroglandular tissue (FGT) and menopausal status

Variable	Benign lesions			Malignant lesions			p-value^*

	N	ADC value (10⁻³ mm²/s)		N	ADC value (10⁻³ mm²/s)

		Mean	SD		Mean	SD
Overall lesions	130	1.529	0.262	218	1.072	0.213	<0.0001
Background parenchymal enhancement
Low BPE	65	1.585	0.305	105	1.098	0.239	<0.0001
High BPE	65	1.472	0.199	113	1.048	0.190	<0.0001
Amount of fibroglandular tissue
Non-dense breast	20	1.401	0.197	47	1.067	0.228	<0.0001
Dense breast	110	1.552	0.267	171	1.073	0.295	0.0003
Menopausal status
Premenopausal	70	1.541	0.256	124	1.044	0.211	<0.0001
Postmenopausal	60	1.515	0.272	94	1.108	0.212	<0.0001

ADC apparent diffusion coefficient, BPE background parenchymal enhancement, FGT fibroglandular tissue, SD standard deviation

Of comparison between benign and malignant lesions