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. 2020 Apr 6;181(2):339–345. doi: 10.1007/s10549-020-05623-4

Table 1.

Characteristics of patients in the training and validation sets

Training N = 950 Validation N = 889
Age (years)* 58.4 (13.1) 57.5 (12.0)
Sex (female) 944 (99.4%) 886 (99.7%)
Tumor type
 Lobular 83 (8.7%) 67 (7.6%)
 Ductal 797 (83.9%) 783 (88.2%)
 Other 70 (7.4%) 38 (4.3%)
Tumor grade
 1 275 (28.9%) 226 (25.4%)
 2 465 (48.9%) 424 (47.7%)
 3 210 (22.1%) 239 (26.9%)
Tumor size (mm)** 16.0 [11.0; 22.0] 17.0 [12.0; 23.0]
Lymphovascular invasion 185 (19.5%) 231 (26.0%)
Estrogen receptors 837 (88.1%) 796 (89.5%)
Progesterone receptors 767 (80.7%) 720 (81.0%)
HER2 overexpression 108 (11.4%) 118 (13.3%)
ki67 (%)** 15.0 [10.0; 25.0] 15.0 [8.00; 30.0]
Risk Score** 3.00 [2.00; 4.00] 3.00 [2.00; 5.00]

Data are summarized as n (%), mean (SD)*, or median [IQR]**, as appropriate