Table 4 Univariate and multivariate prognostic analyses of BCSS after PSM
Characteristics | Univariate | Multivariate | ||||
|---|---|---|---|---|---|---|
HR | 95%CI | P | aHR | 95%CI | P | |
Treatment groups | ||||||
Non-RT | 1.00 | 1.00 | ||||
RT | 0.71 | 0.51–0.98 | 0.039 | 0.66 | 0.47–0.92 | 0.014 |
Age of diagnosis, years | ||||||
< 50 | 1.00 | 1.00 | ||||
50–59 | 0.81 | 0.30–2.17 | 0.678 | 0.91 | 0.34–2.45 | 0.919 |
60–69 | 1.52 | 0.68–3.39 | 0.311 | 1.71 | 0.75–3.88 | 0.152 |
≥ 70 | 2.73 | 1.32–5.62 | 0.006 | 2.83 | 1.32–6.05 | 0.002 |
Era of diagnosis | ||||||
1998–2004 | 1.00 | |||||
2005–2009 | 1.02 | 0.70–1.50 | 0.902 | |||
2010–2015 | 0.87 | 0.48–1.57 | 0.649 | |||
Race | ||||||
White | 1.00 | 1.00 | ||||
Black | 1.60 | 0.99–2.61 | 0.055 | 1.67 | 1.02–2.74 | 0.042 |
Other | 0.55 | 0.26–1.19 | 0.130 | 0.68 | 0.31–1.47 | 0.325 |
Marital status | ||||||
Married | 1.00 | 1.00 | ||||
Non-married | 1.18 | 0.62–2.22 | 0.614 | 1.18 | 0.62–2.25 | 0.620 |
DSW | 2.14 | 1.48–3.08 | < .001 | 1.60 | 1.10–2.35 | 0.015 |
Unknown | 1.99 | 0.94–4.22 | 0.072 | 1.66 | 0.78- 3.52 | 0.189 |
Laterality | ||||||
Left | 1.00 | |||||
Right | 1.03 | 0.74–1.42 | 0.879 | |||
Tumor size (T stage), cm | ||||||
≤ 1.0 (T1) | 1.00 | 1.00 | ||||
1.1–2.0 (T1) | 2.09 | 1.38–3.18 | 0.001 | 2.19 | 1.44–3.33 | < .001 |
2.1–3.0 (T2) | 3.46 | 2.15–5.59 | < .001 | 3.58 | 2.21–5.79 | < .001 |
Tumor grade | ||||||
I | 1.00 | |||||
II | 1.12 | 0.76–1.67 | 0.550 | |||
III/IV | 1.80 | 0.78–4.13 | 0.168 | |||
unknown | 0.87 | 0.57–1.38 | 0.594 | |||
ER status | ||||||
Positive | 1.00 | |||||
Negative | 1.84 | 0.68–5.00 | 0.228 | |||
Unknown | 1.19 | 0.71–1.82 | 0.598 | |||
PR status | ||||||
Positive | 1.00 | |||||
Negative | 1.22 | 0.72–2.07 | 0.452 | |||
Unknown | 1.19 | 0.77–1.85 | 0.421 | |||
Chemotherapy | ||||||
No/Unknown | 1.00 | |||||
Yes | 0.56 | 0.25–1.27 | 0.169 | |||