|
Reference age (years)*
|
61 (59 to 66)
|
61 (59 to 66)
|
61 (59 to 66)
|
|
Age at mammogram (years)*
|
61 (58 to 65)
|
61 (58 to 65)
|
60 (58 to 65)
|
|
MHT at mammogram, N (%)
|
|
Never
|
189 (20.9)
|
110 (24.3)
|
79 (17.4)
|
|
Current
|
432 (47.7)
|
217 (47.9)
|
215 (47.5)
|
|
Past, 0–2 years since last use
|
154 (17.0)
|
50 (11.0)
|
104 (23.0)
|
|
Past, > 2 years since last use
|
131 (14.5)
|
76 (16.8)
|
55 (12.1)
|
|
Type of MHT at mammogram, N (%)
|
|
None
|
189 (20.9)
|
110 (24.3)
|
79 (17.4)
|
|
Oestrogen
|
30 (3.3)
|
15 (3.3)
|
15 (3.3)
|
|
Oestrogens plus progestogens
|
490 (54.1)
|
233 (51.4)
|
257 (56.7)
|
|
Oestrogen plus progesterone or dydrogesterone
|
138 (15.2)
|
79 (17.4)
|
59 (13.0)
|
|
Oestrogen plus progestins
|
239 (26.4)
|
99 (21.9)
|
140 (30.9)
|
|
Both
|
113 (12.5)
|
55 (12.1)
|
58 (12.8)
|
|
Others
|
197 (21.7)
|
95 (21.0)
|
102 (22.5)
|
|
BMI at mammogram (kg/m2)*
|
22.9 (21.1 to 25.1)
|
22.8 (21.0 to 24.8)
|
23.1 (21.3 to 25.4)
|
|
PMD*
|
32 (20 to 45)
|
31 (17 to 43)
|
35 (23 to 49)
|
|
DA (cm2)*
|
33 (20 to 47)
|
29 (17 to 42)
|
35 (23 to 52)
|
|
NDA (cm2)*
|
70 (47 to 97)
|
72 (49 to 97)
|
68 (46 to 96)
|
|
ER and PR status, N (%)**
|
|
ER+ and PR+
| | |
224 (60.6)
|
|
ER+ and PR−
| | |
77 (20.8)
|
|
ER− and PR+
| | |
13 (3.5)
|
|
ER− and PR−
| | |
56 (15.1)
|
|
Family history of breast cancer in first-degree relatives, N (%)
|
|
No
|
771 (85.1)
|
394 (87.0)
|
377 (83.2)
|
|
Yes
|
135 (14.9)
|
59 (13.0)
|
76 (16.8)
|
|
Age of menarche (years), N (%)
|
|
< 12
|
162 (17.9)
|
69 (15.2)
|
93 (20.5)
|
|
12
|
244 (26.9)
|
125 (27.6)
|
119 (26.3)
|
|
> 12
|
500 (55.2)
|
259 (57.2)
|
241 (53.2)
|
|
Past use of oral contraceptives, N (%)
|
|
No
|
452 (49.9)
|
232 (51.2)
|
220 (48.6)
|
|
Yes
|
454 (50.1)
|
221 (48.8)
|
233 (51.4)
|
|
Parity and lactation, N (%)**
|
|
Nulliparous
|
116 (13.6)
|
59 (14.0)
|
57 (13.3)
|
|
Parous without lactation
|
205 (24.1)
|
94 (22.3)
|
111 (25.8)
|
|
Parous with lactation for less than 4 months
|
246 (28.9)
|
123 (29.2)
|
123 (28.6)
|
|
Parous with lactation for 4 months or more
|
284 (33.4)
|
145 (34.4)
|
139 (32.3)
|
