Contribution of clinical breast exam to cancer detection in women participating in a modern screening program

BMC Women's Health

Table 1 Characteristics of the study population

Age group¹	N = 14,857	(%)
< 45	6764	45.5
45 +	8093	54.5
Number of visits to screening center	N = 8378
1	5035	60.1
2	1767	21.1
3	820	9.8
4+	756	9
Marital status²	N = 8378	70.4
Married	5899	15.6
Single	1308	11.5
Divorced	963	2.4
N/A	208
Number of pregnancies²	N = 8378
0	227	2.7
1	646	7.7
2	1571	18.6
3	2034	24.3
4+	2517	30.0
N/A³	1383	16.5
Number of children²	N = 8378
0	262	3.1
1	864	10.3
2	2405	28.7
3	2724	32.5
4+	829	9.9
N/A	1294	15.5
Breast feeding	N = 14,857
No	4547	30.1
Yes	7991	53.8
N/A	2319	15.6
Post-menopausal²	N = 8378
Yes	2406	28.7
No	5531	66.0
N/A	441	5.3
Hormonal treatment	N = 14,857
No	9772	65.8
Yes	2766	18.6
N/A	2319	15.6
Family history²	N = 8378
No	7442	88.8
Yes	906	10.8
N/A	30	0.4
Breast complaints⁴	N = 14,857
No	10,616	71.5
Yes	1214	8.2
N/A	3027	20.3
Previous mammogram	N = 14,857
No	2046	13.8
Yes	9193	61.9
N/A	3618	24.3

Some of the parameters were not available for all the patients
¹Age at the visit
²Information for the first visit of each participant
³N/A—not available
⁴Some non-specific complaints (such as bilateral pain, see methods section for details; Additional file 1: Appendix 1) were not considered abnormal and these visits were not excluded

ISSN: 1472-6874