Table 1 Descriptive characteristics of African-American and European-American women by case-control status in the Women's Circle of Health Study
| Â | African-American | European-American | ||||
|---|---|---|---|---|---|---|
Characteristics | Case (n= 547) | Control (n = 461) | P value | Case (n = 381) | Control (n = 382) | P value |
| Â | Mean (SD) | Mean (SD) | Â | Mean (SD) | Mean (SD) | Â |
Age, years | 51.7 (10.0) | 49.8 (9.9) | 0.003 | 51.0 (8.4) | 50.9 (8.3) | 0.82 |
Body mass index, kg/m2 | 31.2 (6.7) | 31.6 (7.8) | 0.48 | 26.8 (5.8) | 27.7 (7.1) | 0.06 |
Percentage with European ancestry | 0.09 (0.15) | 0.10 (0.16) | 0.19 | 0.98 (0.07) | 0.99 (0.03) | 0.07 |
| Â | Count (%) | Count (%) | Â | Count (%) | Count (%) | Â |
Menopausal status | Â | Â | 0.14 | Â | Â | 0.17 |
   Pre-menopausal | 337 (61.6) | 263 (57.0) |  | 235 (61.7) | 217 (56.8) |  |
   Post-menopausal | 210 (38.4) | 198 (43.0) |  | 146 (38.3) | 165 (43.2) |  |
Family history | Â | Â | 0.13 | Â | Â | 0.001 |
   Yes | 82 (15.0) | 54 (11.7) |  | 104 (27.3) | 67 (17.5) |  |
   No | 465 (85.0) | 407 (88.3) |  | 277 (72.7) | 315 (82.5) |  |
Education | Â | Â | 0.06 | Â | Â | < 0.001 |
   Less than high school | 76 (13.9) | 55 (11.9) |  | 9 (2.4) | 4 (1.1) |  |
   High school | 175 (32.0) | 122 (26.5) |  | 80 (21.0) | 44 (11.5) |  |
   College or above | 296 (54.1) | 284 (61.6) |  | 292 (76.6) | 334 (87.4) |  |
Hormone replacement therapy | Â | Â | 0.74 | Â | Â | 0.47 |
   Yes | 79 (14.5) | 62 (14.2) |  | 96 (25.3) | 88 (23.0) |  |
   No | 464 (85.5) | 397 (85.8) |  | 284 (74.7) | 294 (77.0) |  |