Table 3.

AGD per exposure for FFDM and LE images for five compressed breast thickness categories and for all patients, p-values denote the significance of a pairwise comparison

Compressed breast thickness (mm)	Number of patients	FFDM AGD mean (mGy)	± SD (mGy)	Range (mGy)	LE CESM mean (mGy)	± SD (mGy)	Range (mGy)	Significance
<40 mm	13	1.15	0.24	0.69–1.75	1.6	0.3	1.0 – 2.0	<0.001
41–50 mm	31	1.3	0.3	0.9–2.6	1.8	0.1	1.5 – 2.5	<0.001
51–70 mm	87	1.8	0.3	1.1–2.8	2.5	0.6	1.6 – 3.6	<0.001
71–80 mm	13	2.0	0.3	1.4–2.7	3.22	0.12	3.03 – 3.52	<0.001
>81 mm	3	2.19	0.23	1.90–2.71	2.95	0.18	2.67 – 3.26	<0.001
All	147	1.7	0.4	0.7–2.8	2.3	0.7	1.0 – 3.6	<0.001

FFDM full-field digital mammography, CESM contrast-enhanced spectral mammography, AGD average glandular dose, LE low energy