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Table 1 Clinicopathologic characteristics of the triple-negative studied tumors in function of cluster assignment

From: Identification of three subtypes of triple-negative breast cancer with potential therapeutic implications

Variable All
(n = 238)
Cluster 1
(n = 55)
Cluster 2
(n = 98)
Cluster 3
(n = 85)
P
Age (years; mean ± sd) 54.6 ± 11.6 58.4 ± 11.4 54.4 ± 11.8 52.3 ± 11.0 0.0095
SBR grade
 1 3 2 0 1 0.0054
 2 40 16 10 14
 3 195 37 88 70
Tumor size (mm; mean ± sd) 24.3 ± 12.7 24.3 ± 15.1 25.1 ± 11.7 23.5 ± 12.2 0.69
Nodal status
 0 129 28 54 47 0.85
 1 108 27 43 38  
NPI
 1 15 9 1 5 0.0075
 2 160 31 71 58
 3 61 14 25 22
Radiotherapy
 No 11 3 3 5 0.67
 Yes 224 51 94 79
Adjuvant therapy
 No 13 6 5 2 0.10
 Yes 225 49 93 83
Hormonotherapy     
 No 220 51 92 77 0.94
 Yes 14 3 5 6
Metastasis
 No 184 41 75 68 0.74
 Yes 54 14 23 17
  1. sd standard deviation, SBR Scarff Bloom Richardson, NPI Nottingham prognostic index