Table 2.
Age- and multivariable-adjusted odds ratios (OR) and 95% confidence intervals (95% CI) for receipt of chemotherapy according to race and ODX RS (ODX RS) group among non-Hispanic White (NHW) and non-Hispanic Black (NHB) women diagnosed with lymph-node-negative HR + /HER− breast cancer, an ODX RS from Genomic Health, Inc., 2010–2014 and registered with the Georgia Cancer Registry
| NHW | NHB | ||||||||
|---|---|---|---|---|---|---|---|---|---|
| ODX RS | Chemotherapy | Chemotherapy | Stratum specific | ||||||
| No | Yes | OR (95% CI) | No | Yes | OR (95% CI) | RERIa | OR (95% CI)b,d | OR (95% CI)c,e | |
| Low | 2438 | 102 | Reference | 634 | 33 | 1.20 (0.80, 1.80) | Reference | 1.20 (0.80, 1.80) | 1.16 (0.77, 1.75) |
| Intermediate | 968 | 467 | 11.97 (9.51, 15.1) | 280 | 168 | 13.4 (10.2, 17.8) | 1.28 (−1.72, 4.28) | 1.12 (0.89, 1.41) | 1.10 (0.87, 1.38) |
| High | 62 | 298 | 134.4 (95.1, 190) | 34 | 155 | 108 (70.3, 165) | −22.4 (−76.0, 31.2) | 0.80 (0.50, 1.28) | 0.77 (0.48, 1.24) |
aRelative excess risk due to interaction
bAge-adjusted
cAdjusted for age and stage
dp-value = 0.39
ep-value = 0.38