Table 6 Cox regression analysis of overall survival for the patients that did not receive radiation therapy.
Univariate analysis [HR, 95% CI, p value] | Multivariate analysis [HR, 95% CI, p value] | |
|---|---|---|
Age | ||
≥70 yrs vs. <70 | 1.41 (0.85–2.33), p = 0.1876 | 1.23 (0.73–2.07), p = 0.4352 |
Comorbidities | ||
0 | Reference | Reference |
≥1 | 1.47 (0.84–2.58), p = 0.1800 | 1.48 (0.83–2.63), p = 0.1878 |
Laterality | ||
Right | Reference | N/A |
Left | 1.13 (0.68–1.87), p = 0.6388 | |
Hormone status | ||
HS, no ET | Reference | Reference |
HS, received ET | 0.37 (0.20–0.69), p = 0.0018 | 0.33 (0.18–0.61), p = 0.0005 |
ER−/PR− | 0.40 (0.20–0.81), p = 0.0111 | 0.35 (0.17–0.70), p = 0.0032 |
Tumor size | ||
≤1 cm | Reference | N/A |
>1–2 cm | 1.04 (0.60–1.79), p = 0.8894 | |
Tumor grade | ||
Grade 1–2 | Reference | N/A |
Grade 3 | 1.28 (0.76–2.15), p = 0.3597 | |
Unknown | 0.86 (0.20–3.64), p = 0.8366 | |
Facility type | ||
Other | Reference | Reference |
Academic | 0.63 (0.34–1.16), p = 0.1404 | 0.64 (0.34–1.19), p = 0.1604 |
Unknown | 0.00 (0.00-Inf), p = 0.9804 | 0.00 (0.00-Inf), p = 0.9917 |
Race/ethnicity | ||
NH-White | Reference | Reference |
NH-Black | 0.81 (0.32–2.03), p = 0.6543 | 0.81 (0.32–2.04), p = 0.6560 |
Hispanic | 0.24 (0.03–1.73), p = 0.1565 | 0.23 (0.03–1.71), p = 0.1527 |
NH-Other | 0.00 (0.00-Inf), p = 0.9829 | 0.00 (0.00–Inf), p = 0.9887 |
Unknown | 1.37 (0.19–9.94), p = 0.7534 | 1.47 (0.20–10.86), p = 0.7089 |
No HSD | ||
<20% | Reference | N/A |
≥20% | 0.76 (0.43–1.32), p = 0.3213 | |
Unknown | 0.40 (0.06–2.88), p = 0.3608 | |
Income status | ||
≥$46,000/yr | Reference | N/A |
<$46,000/yr | 1.03 (0.61–1.73), p = 0.9230 | |
Unknown | 0.44 (0.06–3.27), p = 0.4245 | |
Distance to facility | N/A | |
<8.9 miles | Reference | |
≥8.9 miles | 0.93 (0.56–1.55), p = 0.7915 | |
Chemotherapy | ||
Single-agent | Reference | N/A |
Multi-agent | 0.99 (0.58–1.69), p = 0.9711 | |
Not specified | 1.61 (0.38–6.83), p = 0.5216 | |
