Table 1.
Vital status and factors potentially related to breast density and tumour detection
|
Factors |
Category |
Alive (n = 496) |
Dead breast cancer (n = 76) |
Dead other cause (n = 47) |
All (n = 619) |
|---|---|---|---|---|---|
| Number (column percent) Mean, SD in italics | |||||
| Age at baseline |
Years |
56.0 (6.6) |
58.2 (7.8) |
61.6 (6.9) |
56.7 (7.0) |
| Age at diagnosis |
Years |
64.0 (7.3) |
64.5 (8.7) |
67.8 (7.6) |
64.4 (7.5) |
| HRT at diagnosis |
No |
169 (34.1) |
17 (22.4) |
11 (23.4) |
197 (31.8) |
| |
Yes |
168 (33.9) |
21 (27.6) |
11 (23.4) |
200 (32.3) |
| |
Unknown |
159 (32.0) |
38 (50.0) |
25 (53.2) |
222 (35.9) |
| Menopausal status at diagnosis |
Premenopausal |
40 (8.1) |
11 (14.5) |
2 (4.3) |
53 (8.6) |
| |
Postmenopausal |
446 (89.9) |
65 (85.5) |
42 (89.4) |
553 (89.3) |
| |
Unknown |
10 (2.0) |
0 (0.0) |
3 (6.4) |
13 (2.1) |
| BMI at baseline |
<20 |
21 (4.2) |
4 (5.3) |
2 (4.3) |
27 (4.4) |
| |
20- < 25 |
242 (48.8) |
33 (43.4) |
18 (38.3) |
293 (47.3) |
| |
25- < 30 |
159 (32.1) |
30 (39.5) |
14 (29.8) |
203 (32.8) |
| |
≥30 |
74 (14.9) |
9 (11.8) |
13 (27.7) |
96 (15.5) |
| Detection mode (three categories) |
Non-symptomatic |
301 (60.7) |
27 (35.5) |
22 (46.8) |
350 (56.5) |
| |
Interval |
68 (13.7) |
13 (17.1) |
6 (12.8) |
87 (14.1) |
| |
Symptomatic |
122 (24.6) |
36 (47.4) |
19 (40.4) |
177 (28.6) |
| |
Unknown* |
5 (1.0) |
0 (0.0) |
0 (0.0) |
5 (0.8) |
| Detection mode (symptomatic including interval cancer) |
Non-symptomatic |
301 (60.7) |
27 (35.5) |
22 (46.8) |
350 (56.5) |
| |
Symptomatic |
195 (39.3) |
49 (64.5) |
25 (53.2) |
269 (43.5) |
| Breast density |
Fatty |
73 (14.7) |
7 (9.2) |
13 (27.7) |
93 (15.0) |
| |
Moderate |
254 (51.2) |
37 (48.7) |
21 (44.7) |
312 (50.4) |
| |
Dense |
169 (34.1) |
32 (42.1) |
13 (27.7) |
214 (34.6) |
| Diagnostic period |
1991-1996 |
62 (12.5) |
21 (27.6) |
11(23.4) |
94 (15.2) |
| |
1997-2001 |
173 (34.9) |
28 (36.8) |
19 (40.4) |
220 (35.6) |
| 2002-2007 | 261 (52.6) | 27 (35.5) | 17 (36.2) | 305 (49.3) | |
*Unknown if interval or symptomatic cancer.