Table 2.
Factors predicting the surgical procedure performed (mastectomy vs breast conserving surgery)
| Variables | OR | 95% CI | P-value |
|---|---|---|---|
|
| |||
| Age (years) | |||
| <50 | 1 | ||
| ≥50 | 0.585 | 0.556–0.616 | <0.001 |
| Race/ethnicity | |||
| Non-Hispanic White | 1 | ||
| Non-Hispanic Black | 0.997 | 0.913–1.088 | 0.942 |
| Hispanic (all races) | 0.981 | 0.900–1.070 | 0.669 |
| Other | 1.237 | 1.143–1.339 | <0.001 |
| Grade | |||
| Well differentiated | 1 | ||
| Moderately differentiated | 1.138 | 1.077–1.201 | <0.001 |
| Poorly/undifferentiated | 1.239 | 1.151–1.334 | <0.001 |
| Unknown | |||
| Tumor stage | |||
| T1 | 1 | ||
| T2 | 1.768 | 1.671–1.870 | <0.001 |
| PR status | |||
| Negative | 1 | ||
| Positive | 0.833 | 0.771–0.900 | <0.001 |
| Chemotherapy | |||
| No/unknown | 1 | ||
| Yes | 0.844 | 0.793–0.899 | <0.001 |
| 21-gene recurrence score | |||
| Low risk | 1 | ||
| Intermediate risk | 1.004 | 0.952–1.059 | 0.883 |
| High risk | 1.286 | 1.167–1.417 | 0 |
Abbreviations: N, node; OR, odds radio; PR, progesterone receptor; T, tumor.