Table 2 Univariable and multivariable Cox analysis for predicting overall survival in training cohort.
Training cohort (N = 1961) | Univariate analysis | Multivariate analysis | ||
|---|---|---|---|---|
Hazard ratio (95% CI) | P value | Hazard ratio (95% CI) | P value | |
Age | ||||
< 75 | Reference | Reference | ||
≥ 75 | 3.283 (2.858–3.772) | < 0.001 | 2.860 (2.474–3.307) | < 0.001 |
Race | ||||
White | Reference | Reference | ||
Black | 1.592 (1.103–1.926) | < 0.001 | 1.451 (1.044–2.010) | 0.042 |
Asian and other | 0.589 (0.392–0.884) | 0.011 | 0.712 (0.472–1.074) | 0.055 |
Grade | ||||
1 | Reference | Reference | ||
2 | 1.336 (1.089–1.639) | 0.005 | 1.114 (0.903–1.374) | 0.314 |
3 | 1.948 (1.575–2.409) | < 0.001 | 1.353 (1.083–1.691) | 0.008 |
Surgery | ||||
BCS | Reference | Reference | ||
Mastectomy | 0.891 (0.711–1.116) | 0.314 | 1.080 (0.858–1.360) | 0.514 |
No | 3.561 (2.523–5.026) | < 0.001 | 2.556 (1.773–3.686) | < 0.001 |
Primary | ||||
No | Reference | Reference | ||
Yes | 0.621 (0.537–0.717) | < 0.001 | 0.764 (0.658–0.886) | < 0.001 |
Marital status | ||||
Married | Reference | Reference | ||
Unmarried | 1.540 (1.337–1.773) | < 0.001 | 1.360 (1.177–1.572) | < 0.001 |
Stage | ||||
I | Reference | Reference | ||
II | 1.735 (1.497–2.010) | < 0.001 | 0.851 (0.625–1.160) | 0.308 |
III | 2.906 (2.383–3.544) | < 0.001 | 0.775 (0.431–1.394) | 0.394 |
T stage | ||||
T1 | Reference | Reference | ||
T2 | 1.769 (1.535–2.039) | < 0.001 | 1.691 (1.295–2.208) | < 0.001 |
T3 | 3.791 (2.967–4.843) | < 0.001 | 2.583 (1.579–4.226) | < 0.001 |
T4 | 2.719 (1.785–4.141) | < 0.001 | 2.661 (1.622–4.367) | < 0.001 |
N stage | ||||
N0 | Reference | Reference | ||
N1 | 1.850 (1.393–2.458) | < 0.001 | 1.461 (0.879–2.429) | 0.143 |
N2 | 1.610 (1.373–1.889) | < 0.001 | 1.415 (1.145–1.749) | 0.001 |
N3 | 2.248 (1.582–3.194) | < 0.001 | 1.751 (1.039–2.953) | 0.035 |