European Radiology Experimental

Table 1 Characteristics of the population and digital mammography examinations selected for the study

From: Digital subtraction of temporally sequential mammograms for improved detection and classification of microcalcifications

Variable	Population
Variable	BI-RADS normal (n = 50)	BI-RADS suspicious (n = 50)	Total (n = 100)
Patient age
Mean ± standard deviation	59.42 ± 5.97	60.72 ± 8.00	60.07 ± 7.09
Median	59	61.5	59.5
Range	47−75	38−83	38−83
Interquartile range	55−64	55.75−66.25	55−65
BI-RADS breast density
a	5	5	10
b	33	24	57
c	10	18	28
d	2	3	5
BI-RADS classification
1	22	0	22
2	28	0	28
3	0	0	0
4a	0	27	27
4b	0	15	15
4c	0	6	6
5	0	2	2

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