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Table 4 Univariate and multivariate prognostic analyses of BCSS after PSM

From: Effect of postoperative radiotherapy in women with localized pure mucinous breast cancer after lumpectomy: a population-based study

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    
  1. HR hazard ration, aHR adjust hazard raion, CI confidence interval