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Table 3 Multivariate Cox regression analysis of survival outcomes

From: The effects of postoperative radiotherapy on survival outcomes in patients under 65 with estrogen receptor positive tubular breast carcinoma

Variables BCSS OS
HR 95% CI p HR 95% CI p
Age (years)
  < 50 1    1   
  ≥ 50 0.708 0.227–2.008 0.552 2.03 1.275–3.231 0.003
Race/ethnicity
 Non-Hispanic white 1    1   
 Non-Hispanic black 1.825 0.225–14.794 0.573 1.162 0.473–2.855 0.744
 Hispanic 0.992 0.986 0.433–2.245 0.974
 Other 2.167 0.277–16.936 2.167 0.600 0.190–1.892 0.383
Grade
 Well differentiated 1    1   
 Moderately differentiated 0.986 1.107 0.607–2.019 0.740
 Poorly/undifferentiated 0.996 1.954 0.614–6.220 0.257
Tumor size
 T1c 1    1   
 T1mic 0.998 0.956
 T1a 0.488 0.087–2.736 0.415 0.648 0.385–1.089 0.101
 T1b 1.066 0.319–3.560 0.918 0.943 0.629–1.415 0.778
PR status
 Negative 1    1   
 Positive 0.330 0.112–0.968 0.043 0.712 0.464–1.092 0.120
Chemotherapy
 No/unknown 1    1   
 Yes 2.454 0.489–12.314 0.275 1.781 0.951–3.336 0.071
Radiotherapy
 No 1    1   
 Yes 0.297 0.105–0.836 0.022 0.656 0.441–0.978 0.038
  1. BCSS breast cancer-specific survival, HR hazard ratio, CI confidence interval, OS overall survival, PR progesterone receptor