Table 1.
Frequency distribution (%a) of 4523 women with invasive breast cancer by selected characteristics at diagnosis and alcohol drinking status from age 15 years until diagnosis
| Non-drinkers (N = 1779) |
Drinkers (N = 2744) |
P valueb | |
|---|---|---|---|
| Age at diagnosis (years) | < 0.0001 | ||
| 35–44 | 515 (29.0) | 914 (33.3) | |
| 45–54 | 617 (34.7) | 994 (36.2) | |
| 55–64 | 647 (36.4) | 836 (30.5) | |
| Study site | < 0.0001 | ||
| Atlanta | 331 (18.6) | 545 (19.9) | |
| Seattle | 285 (16.0) | 767 (28.0) | |
| Detroit | 299 (16.8) | 367 (13.4) | |
| Philadelphia | 306 (17.2) | 393 (14.3) | |
| Los Angeles | 558 (31.4) | 672 (24.5) | |
| Race | < 0.0001 | ||
| White | 949 (53.3) | 1976 (72.0) | |
| Black | 830 (46.7) | 768 (28.0) | |
| Education | < 0.0001 | ||
| <High school | 177 (10.0) | 214 (7.8) | |
| High School | 620 (34.9) | 703 (25.6) | |
| Technical school/some college | 597 (33.6) | 867 (31.6) | |
| College graduates | 385 (21.6) | 960 (35.0) | |
| Household income, times the federal poverty guideline | 0.008 | ||
| 0–< 2 | 313 (17.6) | 450 (16.4) | |
| 2–< 3 | 299 (16.8) | 456 (16.6) | |
| 3–< 5 | 453 (25.5) | 603 (22.0) | |
| 5–< 7 | 391 (22.0) | 625 (22.8) | |
| ≥7 | 279 (15.7) | 530 (19.3) | |
| Unknown | 44 (2.5) | 80 (2.9) | |
| Menopausal status at diagnosis | < 0.0001 | ||
| Premenopausal | 742 (41.7) | 1353 (49.3) | |
| Postmenopausal | 835 (46.9) | 1066 (38.9) | |
| Unknown | 202 (11.4) | 325 (11.8) | |
| Number of mammograms in 5 years before diagnosis | 0.83 | ||
| 0 | 536 (30.1) | 809 (29.5) | |
| 1 | 313 (17.6) | 477 (17.4) | |
| 2–3 | 396 (22.3) | 643 (23.4) | |
| ≥4 | 534 (30.0) | 815 (29.7) | |
| Body mass index 5-yrs before diagnosis (kg/m2) | < 0.0001 | ||
| < 20 | 150 (8.4) | 334 (12.2) | |
| 20–24.9 | 698 (39.2) | 1371 (50.0) | |
| 25–29.9 | 505 (28.4) | 678 (24.7) | |
| ≥30 | 426 (24.0) | 361 (13.2) | |
| Number of comorbid conditionsc | < 0.0001 | ||
| 0 | 1032 (58.0) | 1809 (65.9) | |
| 1 | 576 (32.4) | 767 (28.0) | |
| ≥2 | 171 (9.6) | 168 (6.1) | |
| Cigarette smoking status at diagnosis | < 0.0001 | ||
| Never | 1078 (60.6) | 996 (36.3) | |
| Former | 426 (24.0) | 1060 (38.6) | |
| Current | 275 (15.5) | 688 (25.1) | |
| Stage of disease at diagnosis | 0.001 | ||
| Localized | 1022 (57.5) | 1710 (62.3) | |
| Non-localized | 757 (42.5) | 1034 (37.7) | |
| Estrogen receptor status of tumor | < 0.0001 | ||
| Positive | 969 (54.5) | 1685 (61.4) | |
| Negative | 558 (31.4) | 743 (27.1) | |
| Unknown | 252 (14.2) | 316 (11.5) | |
| Histologic type | 0.24 | ||
| Ductal | 1348 (75.8) | 2071 (75.5) | |
| Lobular | 193 (10.9) | 336 (12.2) | |
| Others | 238 (13.4) | 337 (12.3) |
aPercentage may not sum to 100% due to rounding
bP-value ascertained from Chi-square test,
cComorbidities included hypertension, myocardial infarction, stroke, diabetes, and cancers other than non-melanoma skin cancers