Table 1.
Demographic, Lifestyle and Reproductive Characteristics of 682 African-American Breast Cancer Case Patients and Controls
| Characteristic | Cases (%) (n=355) | Controls (%) (n=327) |
|---|---|---|
| Demographic and lifestyle factors | ||
|
| ||
| Age (years) | ||
| Mean ± SD | 48.2 ± 8.3 | 49.7 ± 8.1 |
| Body Mass Index (kg/m2) | ||
| <25 | 84 (23.7) | 83 (25.4) |
| 25–29.9 | 106 (29.9) | 103 (31.5) |
| ≥30 | 165 (46.5) | 141 (43.1) |
| Mean ± SD | 30.4 ± 7.2 | 30.1 ± 6.9 |
| Annual household income (dollars) | ||
| <10,000 | 68 (19.2) | 62 (19.0) |
| 10,000–19,999 | 54 (15.2) | 47 (14.4) |
| 20,000–34,999 | 77 (21.7) | 71 (21.7) |
| 35,000–49,999 | 57 (16.1) | 48 (14.7) |
| 50,000–69,999 | 43 (12.1) | 54 (16.5) |
| ≥70,000 | 46 (13.0) | 41 (12.5) |
| Education | ||
| Less than high school graduate | 44 (12.4) | 34 (10.4) |
| High school graduate | 110 (31.0) | 95 (29.1) |
| Some college or technical school | 139 (39.2) | 132 (40.4) |
| College graduate | 62 (17.5) | 66 (20.2) |
| Current alcohol drinking status | ||
| Always non-drinker | 200 (56.3) | 187 (57.2) |
| Former drinker | 61 (17.2) | 54 (16.5) |
| Current drinker | 94 (26.5) | 86 (26.3) |
| Current smoking status | ||
| Always non-smoker | 170 (47.0) | 145 (44.3) |
| Former smoker | 97 (27.3) | 94 (28.8) |
| Current smoker | 88 (24.8) | 88 (26.9) |
| Lifetime physical activity (hours per week) | ||
| None | 120 (33.8) | 83 (25.4) |
| Up to 3 hours | 177 (49.9) | 172 (52.6) |
| More than 3 hours | 58 (16.3) | 72 (22.0) |
| Reproductive factors | ||
| Family history of breast cancer in first degree relatives | ||
| No | 300 (84.5) | 288 (88.1) |
| Yes | 37 (10.4) | 24 (7.3) |
| Unknown or Adopted | 18 (5.1) | 15 (4.6) |
| Age at menarche (years) | ||
| Mean ± SD | 12.4 ± 1.8 | 12.4 ± 1.8 |
| Ever pregnant (pregnancies > 26 weeks) | ||
| Yes | 311 (87.6) | 279 (85.3) |
| No | 44 (12.4) | 48 (14.7) |
| Total number of full term (>26 week) pregnancies among parous women | ||
| Mean ± SD | 2.5 ± 2.0 | 2.6 ± 2.1 |
| Ever breastfed | ||
| No (no live birth) | 44 (12.4) | 48 (14.7) |
| No | 167 (47.0) | 129 (39.4) |
| Yes (> 2 weeks) | 144 (40.6) | 150 (45.9) |
| Menopausal status | ||
| Premenopausal | 162 (45.6) | 152 (46.5) |
| Postmenopausal | 146 (41.1) | 121 (37.0) |
| Perimenopausal or Indeterminant | 47 (13.2) | 54 (16.5) |