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Table 4 Cox-regression models showing factors affecting the survival of women with breast cancer

From: Diagnosis, treatment characteristics, and survival of women with breast cancer aged 65 and above: a hospital-based retrospective study

  Full model Reduced model
  HR %95 CI p HR %95 CI p
Age (years)         
<65*     0.047     0.025
65-69 0.6 0.2 1.5 0.252 0.5 0.2 1.4 0.189
70-74 1.2 0.5 2.5 0.710 1.1 0.5 2.4 0.773
≥75 3.6 1.2 11.0 0.023 3.0 1.3 6.8 0.009
Comorbidity         
No*         
Yes 2.3 1.3 4.1 0.003 2.3 1.4 4.0 0.002
Stage         
1*     <0.001     <0.001
2 2.0 0.8 5.0 0.149 2.1 0.9 4.9 0.072
3 6.4 2.4 16.7 <0.001 7.1 3.0 16.4 <0.001
4 21.5 6.5 70.6 <0.001 22.5 8.7 58.4 <0.001
Histologic grade         
1*     0.085     0.075
2 1.8 0.8 4.2 0.152 1.8 0.8 4.2 0.149
3 2.5 1.1 5.8 0.033 2.5 1.1 5.8 0.030
Surgical treatment         
Yes*         
No 1.1 0.3 3.3 0.899     
Chemotherapy         
Yes*         
No 1.2 0.5 3.1 0.680     
Radiotherapy         
Yes*         
No 1.2 0.3 3.9 0.819     
−2 log likelihood ratio 788.363 788.659
  1. *Indicates reference category.
  2. HR Hazard ratio (ß).
  3. CI Confidence interval.