Table 1.
Patient and tumor characteristics by self-identified race
| Total | White | Black | p value | |
|---|---|---|---|---|
| N(%) | 515 (100%) | 428 (83%) | 87 (17%) | |
| Age, mean (SD) | 58.3 (12.4) | 58.3 (12.3) | 58.1 (13.2) | 0.9 |
| Metabolic characteristics | ||||
| BMI, mean (kg/m2) | 27.1 (6.4) | 26.3 (5.9) | 31.2 (6.8) | < .0001 |
| Obese (BMI ≥ 30 kg/m2) | 120 (24%) | 79 (19%) | 41 (47%) | < .0001 |
| Abdominal obesity (WC > 88 cm) | 332 (72%) | 250 (67%) | 82 (96%) | < .0001 |
| Metabolic syndrome | 120 (23%) | 85 (20%) | 35 (40%) | < .0001 |
| Comorbidities | ||||
| Charlson Comorbidity Index (≥ 1) | 284 (55%) | 225 (53%) | 59 (68%) | 0.01 |
| Tumor characteristics | ||||
| Tumor size, cm | 1.5 (1.2) | 1.5 (1.2) | 1.7 (1.2) | 0.2 |
| Stage | 0.05 | |||
| I | 327 (64%) | 281 (66%) | 46 (53%) | |
| II | 169 (33%) | 133 (31%) | 36 (41%) | |
| III | 19 (4%) | 14 (3%) | 5 (6%) | |
| Insulin resistant (HOMA-IR > 2.8) | 57 (11%) | 42 (10%) | 15 (17%) | 0.04 |
| NPI > 4.4 | 87 (17%) | 63 (15%) | 24 (28%) | 0.004 |
| iNPI >5.4 | 17 (3%) | 9 (2%) | 8 (9%) | 0.001 |
| Tumor hormone receptor status | ||||
| Estrogen receptor positive | 433 (88%) | 371 (91%) | 62 (77%) | 0.0003 |
| Progesterone receptor positive | 405 (83%) | 346 (85%) | 59 (73%) | 0.01 |
| Her2 positive | 31 (6%) | 25 (6%) | 6 (8%) | 0.65 |
| Triple negative | 38 (8%) | 28 (6%) | 13 (16%) | 0.01 |
| Screening behavior | ||||
| Mammogram ≥ 2 years before diagnosis | 108 (22%) | 91 (22%) | 17 (20%) | 0.6 |
| Lifestyle factors | ||||
| Smoking: never smoker | 265 (54%) | 211 (52%) | 54 (64%) | 0.04 |
| Alcohol: > 2 drinks/week | 122 (25%) | 118 (29%) | 4 (5%) | < .0001 |
| Diet: very good/excellent diet | 264 (54%) | 239 (59%) | 25 (30%) | < .0001 |
| Physical activity: sedentary | 236 (49%) | 184 (47%) | 52 (60%) | 0.02 |
| Socioeconomic factors | ||||
| Education: < college education | 85 (18%) | 54 (14%) | 31 (38%) | < .0001 |
| Income: < $75,000/year | 70 (40%) | 43 (31%) | 27 (75%) | < .0001 |
| Insurance: commercial insurance | 436 (89%) | 364 (90%) | 72 (84%) | 0.1 |