Table 2.
Demographic and tumor characteristics by lymph node status
| Variable | LN positive | LN negative | P value* | |
|---|---|---|---|---|
| Age | <50 | 76 (62.8%) | 45 (37.2%) | .0007 |
| ≥50 | 112 (44.1%) | 142 (55.9%) | ||
| Financial Class | Insured | 74 (51.4%) | 70 (48.6%) | .0019 |
| Uninsured | 8 (57.1%) | 6 (42.9%) | ||
| Medicare | 44 (36.7%) | 76 (63.3%) | ||
| Medicaid | 62 (63.9%) | 35 (36.1%) | ||
| Ethnicity | White | 99 (42.9%) | 132 (57.1%) | .0002 |
| African-American | 50 (59.5%) | 34 (40.5%) | ||
| Hispanic | 37 (71.2%) | 15 (28.8%) | ||
| Other | 2 (25%) | 6 (75%) | ||
| Histology | Ductal | 177 (51.2%) | 169 (48.8%) | .2557 |
| Lobular | 10 (41.7%) | 14 (58.3%) | ||
| Other | 1 (20.0%) | 4 (80.0%) | ||
| Grade | Well-differentiated | 20 (30.8%) | 45 (69.2%) | .0028 |
| Moderately-differentiated | 85 (57%) | 64 (43%) | ||
| Poorly-differentiated | 79 (52.7%) | 71 (47.3%) | ||
| N.A. | 4 (36.4%) | 7 (63.6%) | ||
| ER Status | Positive | 143 (51.3%) | 136 (48.7%) | .4592 |
| Negative | 45 (46.9%) | 51 (53.1%) | ||
| PR Status | Positive | 128 (50.6%) | 125 (49.4%) | .7977 |
| Negative | 60 (49.2%) | 62 (50.8%) | ||
| Ki-67 | <14% | 49 (43.8%) | 63 (56.3%) | .1140 |
| ≥14% | 138 (52.7%) | 124 (47.3%) | ||
| HER-2 | Positive | 60 (62.5%) | 36 (37.5%) | .0050 |
| Negative | 128 (45.9%) | 151 (54.1%) | ||
| Molecular Subtype | Her-2 Enriched | 15 (57.7%) | 11 (42.3%) | .0104 |
| Luminal-HER-2 | 45 (65.2%) | 24 (34.8%) | ||
| Luminal A | 37 (38.9%) | 58 (61.1%) | ||
| Luminal B | 63 (52.5%) | 57 (47.5%) | ||
| Triple Negative | 28 (43.1%) | 37 (56.9%) | ||
| Tumor Size | T1 | 44 (31%) | 98 (69%) | <.0001 |
| T2 | 73 (49.7%) | 74 (50.3%) | ||
| T3 | 37 (82.2%) | 24 (17.8%) | ||
| T4 | 34 (87.2%) | 5 (12.8%) |
N.A. = data not available
*
P value was based on Chi-squared test or Fisher's exact test.