. 2014 Jun 17;87(1039):20130807. doi: 10.1259/bjr.20130807

Table 5.

Mean apparent diffusion coefficient (ADC) values by histological type for ADC_all and the pair combinations of b-values 50, 1000 and 200, 800 s mm⁻²

Histological type	n	ADC (×10 ³mm² s⁻¹) 50–1000^a^,^b, mean ± SD	ADC (×10 ³mm² s⁻¹) 50, 1000^c^,^a, mean ± SD	ADC (×10 ³mm² s⁻¹) 200, 800^c^,^b, mean ± SD	p-value^c	p-value^a	p-value^b
Ductal Ca in situ	9	1.33 ± 0.70	1.35 ± 0.69	1.30 ± 0.76	0.68	0.31	0.95
Invasive ductal Ca	47	1.05 ± 0.40	1.05 ± 0.40	1.06 ± 0.40	0.75	0.51	0.55
Lobular Ca in situ	4	1.09 ± 0.19	1.10 ± 0.20	1.05 ± 0.20	0.07	0.14	0.07
Invasive lobular Ca	20	1.30 ± 0.49	1.27 ± 0.45	1.30 ± 0.43	0.12	0.06	0.44
Mucinous Ca	1	1.47	1.38	1.39	_	_	_
Other malignant^d	8	1.21 ± 0.60	1.19 ± 0.60	1.23 ± 0.61	0.58	0.21	0.89
Fibroadenoma	24	1.80 ± 0.36	1.78 ± 0.37	1.81 ± 0.38	0.46	0.32	0.77
Epithelial proliferative	7	2.03 ± 0.39	2.00 ± 0.36	2.05 ± 0.36	0.06	0.18	0.87
Papilloma	3	1.47 ± 0.11	1.45 ± 0.08	1.47 ± 0.09	0.11	0.59	1.00
Hamartoma	2	1.85 ± 0.48	1.82 ± 0.43	1.92 ± 0.60	0.65	0.65	0.65
Other benign^e	13	1.71 ± 0.39	1.73 ± 0.39	1.70 ± 0.42	0.46	0.51	0.75

Ca, carcinoma; n, number of lesions; SD, standard deviation.

^{^a}

The p-value difference in mean ADC between ADC_all and the pair 50, 1000 s mm⁻² by lesion histological type (Wilcoxon test).

^{^b}

The p-value difference in mean ADC between ADC_all and the pair 200, 800 s mm⁻² by lesion histological type (Wilcoxon test).

^{^c}

The p-value difference in mean ADC between the pairs 50, 1000 and 200, 800 s mm⁻² by lesion histological type (Wilcoxon test).

^{^d}

Not otherwise specified.

^{^e}

Fibrocystic changes, complex sclerosing adenosis, complex cystic lesion.