Table 1.

Diagnostic mammography-level characteristics, stratified by radiologist indication and composite vulnerability score

	Additional evaluation of recent abnormal screening result						Evaluation of breast problem
	Composite vulnerability score*						Composite vulnerability score*
	Non-vulnerable (score = 0)		Moderately vulnerable (score = 1 or 2)		Highly vulnerable (score = 3 or 4)		Non-vulnerable (score = 0)		Moderately vulnerable (score = 1 or 2)		Highly vulnerable (score = 3 or 4)
	N	%	N	%	N	%	N	%	N		N	%
Total number of unique women served	43,562		26,057		6,997		44,939		21,331		8,515
Total number of diagnostic mammography interpretations	47,609		28,372		7,483		52,050		23,193		9,544
Age group, years
40 – 49	17,720	37.2	9,901	34.9	2,207	29.5	23,136	44.4	10,086	43.5	3,781	39.6
50 – 59	15,762	33.1	9,163	32.3	2,461	32.9	15,732	30.2	6,931	29.9	2,760	28.9
60 – 69	8,393	17.6	5,599	19.7	1,743	23.3	7,921	15.2	3,811	16.4	1,850	19.4
70 – 80	5,734	12.0	3,709	13.1	1,072	14.3	5,261	10.1	2,365	10.2	1,153	12.1
Breast density
1: Almost entirely fat	1,416	3.0	1,298	4.6	276	3.7	3,225	6.2	1,509	6.5	493	5.2
2: Scattered fibroglandular densities	18,543	38.9	13,699	48.3	4,119	55.0	18,020	34.6	9,511	41.0	4,786	50.1
3: Heterogeneously dense	24,833	52.2	11,865	41.8	2,643	35.3	24,547	47.2	9,566	41.2	3,383	35.4
4: Extremely dense	2,817	5.9	1,510	5.3	445	5.9	6,258	12.0	2,607	11.2	882	9.2
Time since previous mammography**
No previous mammography	3,425	7.2	1,810	6.4	599	8.0	3,205	6.2	1,861	8.0	1,012	10.6
< 12 months	4,214	8.9	1,913	6.7	753	10.1	17,305	33.2	8,318	35.9	2,618	27.4
12 – 18 months	22,726	47.7	16,574	58.4	3,725	49.8	17,258	33.2	6,692	28.9	2,845	29.8
19 – 30 months	11,373	23.9	4,515	15.9	1,215	16.2	7,696	14.8	3,171	13.7	1,412	14.8
31 – 42 months	2,653	5.6	1,662	5.9	498	6.7	2,691	5.2	1,309	5.6	616	6.5
43+ months	3,218	6.8	1,898	6.7	693	9.3	3,895	7.5	1,842	7.9	1,041	10.9
BI-RADS assessment for all mammography
1: Negative	13,978	29.4	9,509	33.5	2,805	37.5	23,201	44.6	10,551	45.5	4,932	51.7
2: Benign finding	13,774	28.9	7,301	25.7	1,999	26.7	20,219	38.8	7,698	33.2	2,774	29.1
3,0: Probably benign finding/Need additional imaging†	13,614	28.6	7,396	26.1	1,564	20.9	3,948	7.6	2,278	9.8	748	7.8
3,0: Probably benign finding/Need additional imaging‡	145	0.3	226	0.8	82	1.1	368	0.7	338	1.5	230	2.4
4: Suspiciously abnormal	5,610	11.8	3,714	13.1	981	13.1	3,474	6.7	1,857	8.0	662	6.9
5: Highly suggestive of malignancy	488	1.0	226	0.8	52	0.7	840	1.6	471	2.0	198	2.1

^*Composite vulnerability scores were calculated by adding 1 for each of the following vulnerability indices met: Education: < 83% of the facility population completed high school; Race/ethnicity: > 30% of the facility population are minorities; Rural/urban residence: average percentage of rural residences among the facility population is > 52%; and Income: average median household income among the facility population is < $45,000.

^**For diagnostic mammography taken for ‘Additional evaluation of a recent abnormal screening result’ time since previous mammography is measured from the screen which led to the diagnostic mammography rather than the diagnostic mammography itself. For diagnostic mammography taken for ‘Evaluation of a breast problem’, time since previous mammography is measured from the diagnostic mammography.

^†Include a final recommendation for short interval follow-up, other work-up, additional imaging, clinical follow-up, or routine care

^‡Included a final recommendation for biopsy, FNA, or surgical consult.