Breast Density and Breast Cancer Incidence in the Lebanese Population: Results from a Retrospective Multicenter Study

Table 4

Comparison between the four categories of breast density by clinical characteristics (,049).

	Breast density category								value test
	I		II		III		IV
	Menopause										Fisher: <0.001
Yes	90	16.3%	273	49.4%	171	30.9%	19	3.4%
No	11	2.3%	117	24.0%	306	62.7%	54	11.1%
Total	101	9.7%	390	37.5%	477	45.8%	73	7.0%
Breastfeeding									: 0.181, Fisher: 0.176
Yes	57	10.4%	221	40.5%	236	43.2%	32	5.9%
No	41	9.7%	144	34.2%	206	48.9%	30	7.1%
Total	102	10.1%	393	37.7%	481	45.7%	73	6.4%
Parity									Fisher: <0.001
0	15	7.7%	56	28.7%	103	52.8%	21	10.8%
1	4	5.3%	23	30.3%	45	59.2%	4	5.3%
2	16	6.3%	92	36.1%	128	50.2%	19	7.5%
3	32	12.3%	103	39.5%	113	43.3%	13	5.0%
4	17	14.7%	53	45.7%	42	36.2%	4	3.4%
5	6	14.6%	24	58.5%	11	26.8%	0	0.0%
6	5	26.3%	9	47.4%	4	21.1%	1	5.3%
7	2	40.0%	2	40.0%	1	20.0%	0	0.0%
8	2	66.7%	1	33.3%	0	0.0%	0	0.0%
9	0	0.0%	2	100.0%	0	0.0%	0	0.0%
Total	99	10.2%	365	37.5%	447	45.9%	62	6.4%
Parity cut-off									Fisher: <0.001
≤1	19	7.0%	79	29.2%	148	54.6%	25	9.2%
>1	80	11.4%	286	40.7%	299	42.6%	37	5.3%
HRT in postmenopausal women									Fisher: 0.829
No	80	16.4%	241	49.5%	148	30.4%	18	3.7%
Yes	10	15.2%	32	48.5%	23	34.8%	1	1.5%
Breast cancer									Fisher: 0.567
Yes	15	12.5%	44	36.7%	51	42.5%	10	8.3%
No	87	9.4%	349	37.6%	430	46.3%	63	6.8%
Total	102	9.7%	393	37.5%	481	45.9%	73	7.0%
Family history of breast cancer									Fisher: 0.124
Yes	25	8.6%	105	36.0%	133	45.5%	29	9.9%
No	77	10.2%	288	38.0%	348	46.0%	44	5.8%
Total	102	9.7%	393	37.5%	481	45.9%	73	7.0%
Risk assessment of breast cancer									Fisher: 0.293
No	77	10.2%	288	38.0%	348	46.0%	44	5.8%
Low	11	8.8%	44	35.2%	55	44.0%	15	12.0%
Moderate	13	10.7%	44	36.1%	56	45.9%	9	7.4%
High	1	2.2%	17	37.8%	22	48.9%	5	11.1%
Total	102	9.7%	393	37.5%	481	45.9%	73	7.0%
BI-RADS final report classification									Fisher: 0.056
0	0	0.0%	3	37.5%	3	37.5%	2	25.0%
1	22	17.5%	47	37.3%	54	42.9%	3	2.4%
2	68	9.6%	261	36.7%	335	47.1%	47	6.6%
3	9	5.6%	64	40.0%	69	43.1%	18	11.3%
4	2	5.9%	14	41.2%	16	47.1%	2	5.9%
5	1	12.5%	3	37.5%	3	37.5%	1	12.5%
6	0	0.0%	1	50.0%	1	50.0%	0	0.0%
Total	102	9.7%	393	37.5%	481	45.9%	73	7.0%
Screening type statistics	No dense breast (, %)				Dense breast (, %)				: 0.634
Categories 0, 3, 4, 5	96		45.7%		114		54.3%
Categories 1, 2	398		47.6%		439		52.4%
Diagnostic type statistics	No dense breast (, %)				Dense breast (, %)				Fisher: 0.962
Categories 4, 5	20		47.6%		22		52.4%
Categories 1, 2, 3	471		47.2%		526		52.8%
0 versus 1, 2, 3, 4, 5	No dense breast (, %)				Dense breast (, %)				Fisher: 0.729
Categories 0	3		37.5%		5		62.5%
Categories 1, 2, 3, 4, 5	491		47.3%		548		52.7%

level set at 5%.