Table 1 Vital status and factors potentially related to breast density and tumour detection
From: Breast density and mode of detection in relation to breast cancer specific survival: a cohort study
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) | |