Table 2.
Relative Risk Ratios (RRRs) and 95% Confidence Intervals (CIs) of Neighborhood Socioeconomic Status (nSES) with Breast Cancer Subtypes
| Tertile of nSES score | |||||
|---|---|---|---|---|---|
| T1 Lowest nSES | T2 Middle nSES | T3 Highest nSES | p-trend | ||
| Luminal A | n (%) | 237 (33.4) | 237 (33.4) | 236 (33.2) | |
| HER2-positive | n (%) | 79 (34.2) | 78 (33.8) | 74 (32.0) | |
| Model 11 | RRR [95% CI] | 1.06 [0.74–1.53] | 1.05 [0.73–1.51] | 1 [reference] | .73 |
| Model 22 | RRR [95% CI] | 1.19 [0.80–1.77] | 1.13 [0.77–1.65] | 1 [reference] | .39 |
| Model 33 | RRR [95% CI] | 1.54 [0.98–2.40] | 1.38 [0.91–2.09] | 1 [reference] | .054 |
| Triple-negative | n (%) | 110 (39.4) | 102 (36.6) | 67 (24.0) | |
| Model 11 | RRR [95% CI] | 1.63 [1.15–2.33] | 1.52 [1.06–2.17] | 1 [reference] | .005 |
| Model 22 | RRR [95% CI] | 1.51 [1.03–2.21] | 1.47 [1.02–2.14] | 1 [reference] | .028 |
| Model 33 | RRR [95% CI] | 1.95 [1.27–2.99] | 1.81 [1.20–2.71] | 1 [reference] | .002 |
1
Multilevel multinomial logistic regression models were used with luminal A as the reference group. Model 1 was a crude model.
2
Model 2 adjusted for individual-level covariates: age at diagnosis, education, household poverty level, health insurance, menopausal status, parity/age at first birth/lactation, and BMI 1 year prior to diagnosis.
3
Model 3 additionally adjusted for census tract-level proportion of Black residents.