Not all false positive diagnoses are equal: On the prognostic implications of false-positive diagnoses made in breast MRI versus in mammography / digital tomosynthesis screening

Table 3 Distribution of tissue categories found in nonmalignant breast biopsies

	DM/DBT (n = 195)			DCE-MRI (n = 202)
Type	No. of patients	%	95% CI	No. of patients	%	95% CI
Nonproliferative	97	49.7%	42.5–57.0	38	18.8%	13.7–34.9
Simple proliferative	51	25.2%	20.1–32.9	35	17.3%	12.4–23.3
Complex proliferative	12	6.2%	3.2–10.5	48	23.8%	18.1–30.1
Proliferative with atypias	35	18.0%	12.8–24.1	81	40.1%	33.3–47.2
Nonproliferative or simple proliferative	148	75.9%	69.3–81.7	73	36.1%	29.5–43.2
Complex or atypical proliferative	47	24.1%	18.3–30.7	129	63.9%	56.8–70.5
All	195	100.0%		202	100.0%

Abbreviations: DBT Digital breast tomosynthesis, DCE Dynamic contrast-enhanced imaging, DM Digital mammography, MRI Magnetic resonance imaging

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