Table 3.
Multivariate Cox proportional hazard model for assessing outcome-related factors of overall survival.
| Variable | Before PSMa | After PSM | ||
|---|---|---|---|---|
| HRb (95% CIc) | Cox p | HR (95% CI) | Cox p | |
| Age (years old) | ||||
| <50 | 1 | 1 | ||
| ≥50 | 2.071 (0.625–6.862) | 0.234 | 1.481 (0.413–5.318) | 0.547 |
| Race | ||||
| White | 1 | 1 | ||
| Black | 1.018 (0.462–2.240) | 0.966 | 0.686 (0.145–3.241) | 0.634 |
| Others | 0.702 (0.212–2.325) | 0.563 | 1.390 (0.287–6.722) | 0.683 |
| Marital status | ||||
| Married | 1 | 1 | ||
| Not married | 2.410 (1.291–4.498) | 0.006 | 1.662 (0.605–4.566) | 0.325 |
| Grade | ||||
| I + II | 1 | 1 | ||
| III + IV | 0.840 (0.458–1.542) | 0.574 | 0.693 (0.242–1.985) | 0.494 |
| Chemotherapy | ||||
| No | 1 | 1 | ||
| Yes | 0.583 (0.239–1.422) | 0.236 | 0.711 (0.257–1.969) | 0.512 |
| Surgery type | ||||
| BCSd | 1 | 1 | ||
| Mastectomy | 0.742 (0.343–1.607) | 0.449 | 0.691 (0.162–2.943) | 0.617 |
| Radiotherapy | ||||
| No | 1 | 1 | ||
| Yes | 0.357 (0.163–0.781) | 0.010 | 0.281 (0.062–1.277) | 0.100 |
a
Propensity score matching.
b
Hazard ratio.
c
Confidence interval.
d
Breast-conserving surgery.