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. 2020 Mar;8(5):197. doi: 10.21037/atm.2020.01.37

Table 3. Multivariate Cox regression analysis of OS and CSS in the training cohort.

Variable OS CSS
HR 95% CI P HR 95% CI P
Tumor grade
   I 1 1
   II 1.373 1.122–1.680 0.002 1.497 1.201–1.867 <0.001
   III/IV 1.956 1.587–2.410 <0.001 2.197 1.749–2.760 <0.001
T stage
   T1 1 1
   T2 0.95 0.801–1.126 0.553 0.906 0.757–1.083 0.277
   T3 0.88 0.698–1.109 0.279 0.832 0.653–1.061 0.138
   T4 0.951 0.779–1.161 0.622 0.9 0.730–1.109 0.323
Histological type
   Ductal 1 1
   Lobular 1.275 1.077–1.509 0.005 1.327 1.111–1.586 0.002
   Mixed ductal and lobular 1.115 0.887–1.401 0.351 1.139 0.896–1.447 0.288
   Others 1.415 1.160–1.726 0.001 1.438 1.171–1.765 0.001
Tumor size (cm)
   <5 1 1
   5–10 1.242 1.070–1.442 0.004 1.274 1.089–1.490 0.002
   >10 1.581 1.269–1.970 <0.001 2.674 1.334–2.100 <0.001
Tumor subtype
   Luminal A 1 1
   Luminal B 0.831 0.714–0.968 0.017 0.783 0.667–0.919 0.003
   HER2+ 0.987 0.795–1.226 0.907 0.94 0.750–1.179 0.592
   Triple-negative 3.217 2.755–3.757 <0.001 3.196 2.720–3.756 <0.001
Surgery
   Yes 1 1
   No 1.664 1.490–1.858 <0.001 1.65 1.470–1.852 <0.001
Chemotherapy
   Yes 1 1
   No 1.595 1.426–1.783 <0.001 1.557 1.385–1.751 <0.001
Number of metastatic organs except bone
   0 1 1
   1 1.585 1.414–1.777 <0.001 1.655 1.468–1.867 <0.001
   ≥2 2.664 2.294–3.093 <0.001 2.843 2.430–3.326 <0.001

Grade I: well differentiated; Grade II: moderately differentiated; Grade III: poorly differentiated; Grade IV: undifferentiated anaplastic. OS, overall survival; CSS, cancer-specific survival.