Table 1 Characteristics of the cohort selected from the Mayo Mammography Health Study (S2)

Patient age at date of mammography

54.8 ± 10.5

55.8 ± 10.6

0.28

Age

 50–59, No. (%)

125 (28%)

61 (27%)

0.73

 60–69, No. (%)

108 (24%)

58 (26%)

0.73

 70+, No. (%)

33 (7%)

22 (10%)

0.31

Body mass index (Kg/m²)

27.9 ± 6.6

27.9 ± 5.5

0.96

Postmenopause, No. (%)

277 (63%)

131 (58%)

0.24

Postmenopausal hormone use

 Never, No. (%)

226 (51%)

124 (55%)

0.36

 Former, No. (%)

23 (5%)

9 (4%)

0.48

 Current, No. (%)

119 (27%)

64 (28%)

0.70

 Unknown, No. (%)

74 (17%)

29 (13%)

0.19

Time to diagnosis/enrollment

8.1 ±3.4

8.6 ±3.9

0.09

Breast area (cm²)

168.8 ±72.0

169.0 ±67.2

0.98