Table 1.
CWLS participant characteristics
|
N (%) N = 4,441a |
All-cause Deaths, % N = 525 |
Breast cancer Deaths, % N = 137 |
|
|---|---|---|---|
| Characteristics at breast cancer diagnosis | |||
| Age, y | |||
| <40 | 172 (3.9%) | 1.5% | 5.8% |
| 40–49 | 686 (15.4%) | 7.4% | 18.3% |
| 50–59 | 1,377 (31.0%) | 17.9% | 34.3% |
| 60–69 | 1,669 (37.6%) | 40.2% | 35.8% |
| 70–79 | 537 (12.1%) | 33.0% | 5.8% |
| Breast cancer stage | |||
| Local | 3,233 (72.8%) | 10.3% | 1.8% |
| Regional | 1,208 (27.2%) | 16.0% | 6.6% |
| Postmenopausalb | |||
| No | 1,011 (22.8%) | 4.9% | 3.5% |
| Yes | 3,254 (73.3%) | 14.4% | 3.0% |
| Alcohol, drinks/d | |||
| None | 702 (15.8%) | 13.8% | 3.0% |
| <1 | 2,946 (66.3%) | 11.2% | 3.0% |
| 1–2 | 530 (11.9%) | 11.7% | 2.8% |
| >2 | 239 (5.4%) | 14.2% | 4.6% |
| Hormone replacement therapy, duration | |||
| None | 2,527 (56.9%) | 11.9% | 3.0% |
| <2 years | 357 (8.0%) | 14.9% | 3.6% |
| ≥2 years | 1,120 (25.2%) | 9.0% | 3.2% |
| Smoking history | |||
| Never | 2,136 (48.1%) | 9.2% | 2.8% |
| Former | 1,536 (34.6%) | 13.1% | 2.8% |
| Current | 752 (16.9%) | 17.0% | 4.5% |
| Education | |||
| < 12 years | 388 (8.7%) | 18.6% | 2.6% |
| ≥ 12 years | 4,041 (91.0%) | 11.2% | 3.1% |
| Breast cancer treatmentc | |||
| Surgery | 4,346 (97.9%) | 11.5% | 3.1% |
| Radiation | 2,210 (49.8%) | 9.7% | 3.5% |
| Hormonal therapy | 2,568 (57.8%) | 10.9% | 3.4% |
| Chemotherapy | 1,417 (31.9%) | 9.7% | 5.3% |
| Characteristics at follow-up | |||
| Body mass index, kg/m2 | |||
| <20 | 209 (4.7%) | 19.6% | 1.9% |
| 20–24.9 | 1,485 (33.4%) | 10.2% | 2.2% |
| 25–29.9 | 1,452 (32.7%) | 10.7% | 2.8% |
| ≥30 | 1,038 (23.4%) | 12.9% | 4.9% |
| Physical activity, MET-h/wk | |||
| ≤2.7 | 1,064 (24.0%) | 20.4% | 4.0% |
| 2.8–7.9 | 1,038 (23.4%) | 10.2% | 2.6% |
| 8.0–20.9 | 1,147 (25.8%) | 8.8% | 2.8% |
| ≥ 21.0 | 1,091 (24.6%) | 7.2% | 3.0% |
a
Numbers may not sum to total because of missing values
b
Women with unknown menopausal status are excluded
c
Can reflect more than one treatment type