|
At cohort enrollment
| | | |
|
Age (mean ± SD)
|
49.9 ± 4.2 (range 40-60)
|
50.5 ± 3.8 (range 41-60)
|
0.07
|
|
BMI (kg/m2)
|
24.6 ± 4.8 (range 17-50)
|
24.7 ± 4.9 (range 17-47)
|
0.68
|
|
White (N (%))
|
624 (87%)
|
284 (100%)
| |
|
Nulliparous women (N (%))
|
141 (20%)
|
63 (22%)
|
0.33
|
|
Menopausal status
| | | |
|
Premenopausal
|
432 (60%)
|
155 (55%)
|
0.012
|
|
Perimenopausal
|
87 (12%)
|
55 (19%)
| |
|
Postmenopausal
|
201 (28%)
|
74 (26%)
| |
|
Ever had breast biopsy (N (%))
|
108 (15%)
|
40 (14%)
|
0.71
|
|
Positive 1st degree family history of breast cancer (N (%))
|
64 (9%)
|
37 (13%)
|
0.053
|
|
At mammogram substudy enrollment
| | | |
|
Age at interview (mean ± SD)
|
62 ± 4.0 (range 52-71)
|
62 ± 3.6 (range 53-72)
|
0.11
|
|
BMI (kg/m2)
|
26.2 ± 5.2 (range 17-49)
|
25.7 ± 5.0 (range 18-47)
|
0.16
|
|
Positive 1st degree family history of breast cancer (N (%))
|
112 (16%)
|
51 (18%)
|
0.43
|
|
Number of mammograms in the past 10 years
|
8.8 ± 2.3 (range 2-20)
|
8.9 ± 2.2 (range 2-18)
|
0.59
|
|
At time of mammography evaluated for density
| | | |
|
Age at time of mammogram while taking EPT
| |
56 ± 4 (range 45-67)
| |
|
Age at time of mammogram while off EPT
| |
60 ± 5 (range 49-71)
| |
|
BMI at time of mammogram while taking EPT
| |
25.7 ± 5.2 (range 18-47)
| |
|
BMI at time of mammogram while off EPT
| |
25.8 ± 5.0 (range 18-48)
| |
|
Years on EPT at time of mammogram while taking EPT
| | | |
|
<1 year
| |
15 (5%)
| |
|
1- < 4 years
| |
121 (43%)
| |
|
4- < 7 years
| |
112 (39%)
| |
|
≥7 years
| |
36 (13%)
| |
|
Time interval between two mammograms (years)
| | | |
|
≤3 years
| |
141 (50%)
| |
|
4-5 years
| |
106 (37%)
| |
|
6-9 years
| |
37 (13%)
| |
