Table 1. Comparison of Covariates for Older Women With and Without Breast Cancera.
| Breast Cancer Cases by Treatment Type | |||||
|---|---|---|---|---|---|
|
| |||||
| Characteristic | Women Without Breast Cancer (N = 2710) | Women With Breast Cancer (N = 542) | Breast-Conserving Surgery (N = 96) | Breast-Conserving Surgery + RT (N = 258) | Mastectomy (±RT)(N = 188) |
| Education, N (%) | |||||
| ≤High school | 1614 (60%) | 335 (62%) | 69 (72%) | 143 (55%) | 123 (65%) |
| Some college or 2-year degree | 676 (25%) | 127 (23%) | 18 (19%) | 68 (26%) | 41 (22%) |
| College graduate or higher | 420 (15%) | 80 (15%) | 9 (9%) | 47 (18%) | 24 (13%) |
| Mean age at baseline survey (SD), years | 74.76 (6.36) | 74.33 (5.76) | 76.21 (7.16) | 73.48 (5.01) | 74.54 (5.72) |
| Race, N (%) | |||||
| White | 2156 (80%) | 418 (77%) | 80 (83%) | 193 (75%) | 145 (77%) |
| Asian/Pacific Islander | 209 (8%) | 48 (9%) | 5 (5%) | 25 (10%) | 18 (9%) |
| Hispanic | 176 (6%) | 33 (6%) | 4 (4%) | 18 (7%) | 11 (6%) |
| Black/African American | 128 (5%) | 33 (6%) | 6 (6%) | 16 (6%) | 11 (6%) |
| Another race or multirace | 41 (1%) | 10 (2%) | 1(1%) | 6(2%) | 3 (2%) |
| Marital status (baseline), N (%) | |||||
| Married | 1330 (49%) | 259 (48%) | 45 (47%) | 136 (53%) | 78 (41%) |
| Widowed | 960 (35%) | 192 (35%) | 36 (38%) | 77 (30%) | 79 (42%) |
| Divorced/separated | 312 (12%) | 64 (12%) | 10 (10%) | 28 (11%) | 26 (14%) |
| Never married | 35 (1%) | 9 (2%) | 2 (2%) | 7 (3%) | 0 (0%) |
| Smoking status, N (%) | |||||
| Never | 1739 (64%) | 345 (64%) | 69 (72%) | 170 (66%) | 106 (56%) |
| Former | 694 (26%) | 132 (24%) | 21 (22%) | 51 (20%) | 60 (32%) |
| Current | 160 (6%) | 34 (6%) | 2 (2%) | 18 (7%) | 14 (7%) |
| Proxy (baseline), N (%) | |||||
| Yes | 135 (5%) | 33 (6%) | 10 (10%) | 10 (4%) | 13 (7%) |
| Preexisting conditions, N (%) | |||||
| Hypertension/high blood pressure | 1611 (60%) | 339 (62%) | 61 (63%) | 157 (61%) | 121 (64%) |
| Angina pectoris/coronary artery disease | 275 (10%) | 55 (10%) | 14 (14%) | 25 (10%) | 16 (9%) |
| Arthritis of hip or knee | 1157 (43%) | 241 (44%) | 52 (54%) | 99 (38%) | 90 (48%) |
| Sciatica | 644 (24%) | 135 (25%) | 22 (23%) | 62 (24%) | 50 (27%) |
| Other heart conditions | 549 (20%) | 122 (22%) | 21 (22%) | 48 (19%) | 53 (28%) |
| Diabetes | 369 (14%) | 75 (14%) | 10 (10%) | 31 (12%) | 34 (18%) |
| Emphysema, asthma, or COPD | 287 (11%) | 62 (11%) | 13 (13%) | 25 (10%) | 24 (13%) |
| Stroke | 153 (6%) | 36 (7%) | 7 (7%) | 16 (6%) | 13 (7%) |
| Myocardial infarction/heart attack | 135 (5%) | 23 (4%) | 5 (5%) | 9 (3%) | 9 (5%) |
| Congestive heart failure | 87 (3%) | 21 (4%) | 3 (3%) | 9 (3%) | 9 (5%) |
| Crohn's, ulcerative colitis, or IBD | 135 (5%) | 29 (5%) | 4 (4%) | 11 (4%) | 14 (7%) |
a
All baseline patient characteristics and preexisting conditions were matched between women with and without cancer.
Abbreviations: COPD, chronic obstructive pulmonary disease; IBD, inflammatory bowel disease; RT, radiation therapy; SD, standard deviation.