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. 2019 Jan 30;11(2):649–662. doi: 10.18632/aging.101767

Table 1. Baseline characteristics of study patients.

Variables Primary cohort No. (%) Validation cohort No. (%) P-value
No. of patients 984 492
Age (years) 58(48,67) 58(48,67) 0.767
T stage 0.620
T1 262(26.6) 132(26.8)
T2 570(57.9) 295(59.9)
T3 123(12.5) 50(10.2)
T4 29(3.0) 15(3.1)
N stage 0.987
N0 453(46.0) 222(45.1)
N1 341(34.7) 169(34.4)
N2 107(10.9) 56(11.4)
N3 72(7.3) 39(7.9)
Unknown 11(1.1) 6(1.2)
TNM stage 0.980
I 170(17.3) 82(16.7)
II 569(57.8) 284(57.7)
III 226(23.0) 117(23.8)
IV 19(1.9) 9(1.8)
ER status 0.925
Negative 206(20.9) 101(20.5)
Positive 738(75.0) 369(75.0)
Unknown 40(4.1) 22(4.5)
PR status 0.878
Negative 262(26.6) 137(27.9)
Positive 598(60.8) 295(59.9)
Unknown 124(12.6) 60(12.2)
HER2 status 0.980
Negative 679(69.0) 337(68.5)
Positive 152(15.5) 77(15.6)
Unknown 153(15.5) 78(15.9)

Abbreviations: TNM, tumor-node-metastasis; ER, estrogen receptor; PR, progesterone receptor; HER2, human epithelial growth factor receptor 2.