3.0 Tesla vs 1.5 Tesla breast magnetic resonance imaging in newly diagnosed breast cancer patients

Table 2 Patient and index cancer characteristics n (%)

Characteristic	1.5 Tesla	3.0 Tesla	P value
Age (yr)
median (range)	56	55	0.59
	(35-85)	(26-85)
Family history of breast cancer
None	77 (79)	101 (74)	0.53
Weak1	10 (10)	19 (14)	0.43
Intermediate2	5 (5)	11 (8)	0.44
Strong3	6 (6)	5 (4)	0.53
Index cancer size (mm)
Mean (range)	17.3	18.1	0.68
	(4.0-70.0)	(3.0-92.0)
Index cancer histology
Invasive ductal carcinoma	67 (68)	91 (67)	0.13
Not otherwise specified	65 (66)	86 (63)	0.14
Mucinous type	1 (1)	3 (2)
Medullary type	0	1 (0.7)
Papillary type	0	1 (0.7)
Tubular type	1 (1)	0
Invasive lobular carcinoma	3 (3)	3 (2)	0.11
Mixed invasive lobular and ductal carcinoma	3 (3)	5 (4)	0.70
Ductal carcinoma in situ	25 (26)	37 (27)	0.56

¹Weak family history: second degree or other relatives;

²Intermediate family history: single post-menopausal first-degree relative;

³Strong family history: premenopausal first-degree relative or multiple post-menopausal first-degree relatives. Unless otherwise indicated, data are number of patients and data in parentheses are percentages.