Table 1 Characteristics of women who underwent core biopsy at Martin-Luther-University of Halle (Saale), Germany, between April 2006 and August 2008 (N=695)

Age (Years)

 <40

 40-49

 50-59

 60-69

 70+

BMI (kg/m²)

 <21

 21-24.9

 25-29.9

 30+

Biopsy technique

 Stereotactic

 Ultrasound-guided

 MRI-guided

Referral group

 Screening

 History of breast cancer

 Clinical symptoms

 Only images

BIRADS

 2-3

 4

 5

 6

Radiological findings

 Radiological focus

 Microcalcification

Mammographic breast density (ACR)

 almost entirely fatty

 fibroglandular

 heterogenous dense

 extremely dense

Mammographic breast density (Computer-based assessment)

 <10%

 10% to <25%

 25% to <50%

 ≥50%